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Blood Sweat Tears and Grease => Projects => Cafe Racers => Topic started by: stubsryan on Jul 29, 2017, 02:24:47

Title: Project CB350F cafe brat
Post by: stubsryan on Jul 29, 2017, 02:24:47
(https://uploads.tapatalk-cdn.com/20170729/22926491829afdcf70addf7f0fb692c3.jpg)
Hi all. Picked up a 1972 CB350F on gumtree in adelaide, Australia. Everything was disassembled, bar the engine bottom end when I picked it up a couple months back. There are a bunch of missing parts like rear brake assembly, fuel tank, air box, side covers, battery mount and probably a heap of other crap. Because of all the missing bits I'm turning the old girl into a cafe brat. This is my first bike project which should be fun and educational along the way. That being said, I'm a duel trade refrigeration service technician and electrician so I am familiar with tools and the importance of accuracy with moving parts ie the engine etc. I have all the Cb350f manuals on the iPad so with some time, $$ and perseverance I might end up with a cool little bike to get around on. I kind of figure that if I document the build and even 1 person looks at it, it might give me a bit more drive to get it done. Cheers legends


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Jul 29, 2017, 02:34:30
Here are some photos of all the bits I have and the shed with all the spares(https://uploads.tapatalk-cdn.com/20170729/1c1dcc382c79f70809bc1e2e74100f39.jpg)(https://uploads.tapatalk-cdn.com/20170729/5f1ae60d22b834af91cfe6f41849e214.jpg)(https://uploads.tapatalk-cdn.com/20170729/0958d03ac5382938dab3f196cb4af44d.jpg)(https://uploads.tapatalk-cdn.com/20170729/1530dfbd6f5aab51b23e43d78db676d8.jpg)


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Jul 29, 2017, 02:36:12
Oh and that's a cb360 in the shed. That's another nightmare to deal with


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Jul 30, 2017, 03:17:22
So I have decided to do some work on the forks. The Cb350f forks are rusty but not so much where the seal would be touching under compression. Alternatively I could use some cb360 forks. Not sure which way to go with it(https://uploads.tapatalk-cdn.com/20170730/cf332339f8e3dd9ec423f2e4e7ded063.jpg)(https://uploads.tapatalk-cdn.com/20170730/2169674ef7c0296c607adce156bb1717.jpg)


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Jul 31, 2017, 06:18:01
Just took of the alternator and found a bit of rust. Will ohm test the windings to see if it's ok and clean what I can and cover in some spray oil (https://uploads.tapatalk-cdn.com/20170731/ee04033095f1a4a59f126ea5fcfeaecf.jpg)(https://uploads.tapatalk-cdn.com/20170731/8392d5cfc37327bc23f5bdb4bc311204.jpg)
If at any point anyone what's to tell me I'm doing it wrong then by all means let me know.


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Jul 31, 2017, 06:30:45
(https://uploads.tapatalk-cdn.com/20170731/aec554a852971246ceb8ea7e00432992.jpg)
So the engine top end was disassembled when I picked it up. It also came with gaskets. I was thinking of getting new rings and putting it back together with honing etc but money is a concern. It's $100 for a set of rings. The history from the PO is that he wanted to rebuild it all and get it back to original but he got too old and worked out that it would never happen and decided to sell. Now I'm thinking I just put it back together and check the compression and if it's ok just continue on with the project. Worst case I remove change the rings etc. hope I'm doing the right thing 🤷‍♂️


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Jul 31, 2017, 08:00:37
Dropped a piston pin clip in the bottom end! Don't build engines and drink! guess I continue and drop the bottom out later 🤷‍♂️


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Jul 31, 2017, 08:20:40
Engine build on hold. Found I'm missing two top rings. Don't know how I missed this. Looks like I'm ordering a new set! It's probably for the better anyway


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Jul 31, 2017, 11:28:35
Ok if anyone is out there, I need new rings and they are $100 odd. For $150 I can get overbore cylinders and rings. Obviously would need matching which from a quick google is $65 a cylinder. Seems a lot to me. Should I get rings or go the ton and make a bigger engine? $400 vs $100


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Title: Re: Project CB350F cafe brat
Post by: Antennaman346 on Aug 17, 2017, 17:55:43
Hey, I bought that same seat. Can I ask how you plan on fitting it up to the tank? I think I'm going to cut into the white plastic base so that the tank mount doesn't prevent it from snugging up. No matter how you place it, it's got that wicked gap. Your thoughts?
Title: Re: Project CB350F cafe brat
Post by: stubsryan on Aug 28, 2017, 10:43:41
Hey, I bought that same seat. Can I ask how you plan on fitting it up to the tank? I think I'm going to cut into the white plastic base so that the tank mount doesn't prevent it from snugging up. No matter how you place it, it's got that wicked gap. Your thoughts?

Yeah I was thinking the same thing man. Hopefully I don't butcher the seat but I can't think of another option. It should work


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Dec 11, 2017, 17:54:02
(https://uploads.tapatalk-cdn.com/20171211/80544c25b751050c8331e57184931a6d.heic)(https://uploads.tapatalk-cdn.com/20171211/e4227f28a2accb79cd6f022822d4b51e.heic)

Finally got some piston rings from japan. Hopefully get the engine top end back on soon. Then drop the sump and check the bearings and a general clean and check. Then a soda blast and paint.


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Title: Re: Project CB350F cafe brat
Post by: Odontologist on Dec 12, 2017, 15:50:51
So you went with $100 option? I would have done same. Keep it up. I'm  in.
Title: Re: Project CB350F cafe brat
Post by: stubsryan on Mar 04, 2018, 08:56:08
Summer has been busy with air conditioning and freezers but we just hit autumn so Iím getting back into the bike


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Title: Re: Project CB350F cafe brat
Post by: WhyNot on Mar 04, 2018, 09:11:48
What are you doing with the forks........i just had mine off and they seem to be fine.

Hopefully have mine rolling again today.
Title: Re: Project CB350F cafe brat
Post by: stubsryan on Mar 04, 2018, 09:12:37
Decided to mock up a bit of the bike yesterday. The back rim is the wrong one. So I wanted to change the tank rubber mount locations so the tanks underneath edge runs parallel with the seat. Currently the front dips way down because itís not a Cb350f tank. The tank Iím using came with a cb360 I got but I feel it might even be a cb250 tank maybe. So the next job is to cut and weld the tabs, fasten the tank and move down the bike to the seat. Thatís a bit Iím not real sure about yet. Iím wondering if I should make a seat pan that is hinged so I can easily open the seat or not bother. See, I have the side covers which will be removable and obviously that will give me access to the battery and electrics. So once I work out the seat I will move on to the back loop I need to weld. Then I need to work out the back mud guard so it passes the annoying Australian motorbike laws. All easier said than done 🤦‍♂️


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Mar 04, 2018, 09:17:01
What are you doing with the forks........i just had mine off and they seem to be fine.

Hopefully have mine rolling again today.
I wasnít going to do anything With the forks BUT I just noticed oil coming from one of the seals. I figure thatís not normal so will need to look at that. Do also have a spare set that I may paint to save some money OR I redo the set. I havenít read anything up about it yet so I almost have no idea at this stage. Will sus it soon


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Mar 04, 2018, 09:18:50
So you went with $100 option? I would have done same. Keep it up. I'm  in.
Yeah mate, hopefully itís all good. I did snap 1 ring putting them on so I had to use an old ring which sucks.


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Title: Re: Project CB350F cafe brat
Post by: farmer92 on Mar 04, 2018, 10:20:05
Yeah mate, hopefully itís all good. I did snap 1 ring putting them on so I had to use an old ring which sucks.


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Hopefully you used the sane ring that was in that location initially. Once rings have seated, they wonít function all that well if you switch them around.

Did you give the cylinders a good hone before putting the new rings in? If not, you can always use my patented poor manís hone.

Did you get the circlip out of the bottom end? Best to stuff some shop rags around the con rods when the cylinders come off so nothing gets down there.

Keep at it
Title: Re: Project CB350F cafe brat
Post by: stubsryan on Mar 04, 2018, 10:54:21
Hopefully you used the sane ring that was in that location initially. Once rings have seated, they wonít function all that well if you switch them around.

Did you give the cylinders a good hone before putting the new rings in? If not, you can always use my patented poor manís hone.

Did you get the circlip out of the bottom end? Best to stuff some shop rags around the con rods when the cylinders come off so nothing gets down there.

Keep at it
Not sure what piston it was from. 1 in 4 chance I guess. Even then, it probably depends where the gaps are lined up with, donít know.
Yep the boars got honed.
Will keep that in mind about the rags for next time, I think I had been drinking while doing that part 🤦‍♂️still need to open the bottom up to get the steel that fell in. Will be doing that kinda soon now that work has slowed up a bit. Cheers mate 🤙


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Mar 07, 2018, 07:44:51
Just bought a sandblaster and started blasting a front wheel to see how it goes. Looks like itís going to do the job fairly well


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Mar 07, 2018, 07:46:01
Another 1


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Mar 08, 2018, 03:44:33
So I did some more blasting today and found some rust holes in the rim. Iím now thinking of getting some new rims and spokes from AliExpress which might be 300 clams or so. Iím not sure what size to go for. I believe the front is 1.6 x 18 and the rear is 1.85 x 18. I would like fatter for looks but also for cornering. Iím more a fan of the corners than straight line speed. Color combo will be black rim, stainless spokes and a black hub. Does anyone know what is reasonable to upgrade the size to? Is 2.15 front and 3.00 back too big? Thanks. Oh and here is a photo of the rims. Aluminium cheapies


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Mar 08, 2018, 04:29:51
I may have spoke before I really thought this through. 3.00x18 is really big. Alternatively I can get 2.15x18 for the front and back. Not sure if thatís ok for the front though 🤷‍♂️


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Title: Project CB350F cafe brat
Post by: farmer92 on Mar 08, 2018, 07:10:45
Depends what tire size you want.
I wouldnít go over 100mm in the front, or 120 in the back.
To wide makes it harder to push into corners, not as fun as a bike that can just be tipped in.
Hereís a rim size cheat sheet
 (https://uploads.tapatalk-cdn.com/20180308/fc1130b3242c956b4803408de0ca1098.jpg)


2.15 in the front and a 3 in the rear should be okay.
Title: Re: Project CB350F cafe brat
Post by: stubsryan on Mar 08, 2018, 08:30:26
Depends what tire size you want.
I wouldnít go over 100mm in the front, or 120 in the back.
To wide makes it harder to push into corners, not as fun as a bike that can just be tipped in.
Hereís a rim size cheat sheet
 (https://uploads.tapatalk-cdn.com/20180308/fc1130b3242c956b4803408de0ca1098.jpg)


2.15 in the front and a 3 in the rear should be okay.
Thanks for the help mate ‍♂️


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Title: Re: Project CB350F cafe brat
Post by: Integra99 on Mar 08, 2018, 09:22:19
I'm running 2.1 / 100 front and 2.5 / 110 rear.. I could fit a 120 fear but dont want to affect the handling.

It looks ok..

(http://www.dotheton.com/gallery/107242-120118033153.jpeg)
Title: Re: Project CB350F cafe brat
Post by: stubsryan on Mar 08, 2018, 09:22:43
So front will be 2.15x18 with 100/90 tyre.
Rear will be 3.00x18 with 120/90 tyre. Also think Iím going with the Pirelli sport demon. I hope this works out ok. Now I need to measure the existing spokes and then order it all and stop procrastinating about the other jobs I have to do


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Mar 08, 2018, 09:25:08
I'm running 2.1 / 100 front and 2.5 / 110 rear.. I could fit a 120 fear but dont want to affect the handling.

It looks ok..

(http://www.dotheton.com/gallery/107242-120118033153.jpeg)
Looks good! I canít seem to find a 2.5x18 for the right price so I stepped up a size. Finger crossed it will be ok. Hopefully I can find a 2.5 rim and I will do what you have done


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Mar 08, 2018, 09:29:43
I'm running 2.1 / 100 front and 2.5 / 110 rear.. I could fit a 120 fear but dont want to affect the handling.

It looks ok..

(http://www.dotheton.com/gallery/107242-120118033153.jpeg)
Cool bike! How do you go with Cooling having the engine painted? Iím soda blasting soon but not sure if I should should paint the cylinders and valves..


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Title: Re: Project CB350F cafe brat
Post by: Integra99 on Mar 08, 2018, 09:39:22

Ooh yes rear will be nice.. I had thought about a 3" rear, 120 will be good.  I think front will support the 100 well.

Yes almost finished just tank to paint..

I've got a Yamaha XS750 painted and its been fine.. So I think it will be ok..

(http://www.dotheton.com/gallery/107242-190218034936.jpeg)
Title: Re: Project CB350F cafe brat
Post by: WhyNot on Mar 08, 2018, 10:20:15
Ooh yes rear will be nice.. I had thought about a 3" rear, 120 will be good.  I think front will support the 100 well.

Yes almost finished just tank to paint..

I've got a Yamaha XS750 painted and its been fine.. So I think it will be ok..

(http://www.dotheton.com/gallery/107242-190218034936.jpeg)


Really want to go with tire sizes like you are doing stubsryan, but I'll more than likely stay factory


Nice bike integra99.....love the pipes.

They look familiar:

Title: Re: Project CB350F cafe brat
Post by: Integra99 on Mar 08, 2018, 10:58:56

Nice pipes.. I havent ridden far with them just a few blips.. but sound good so far!
Title: Re: Project CB350F cafe brat
Post by: teazer on Mar 08, 2018, 11:05:41
Just a thought but that's a light bike and wide tires are not a good match if you like corners.  A better combo might be say 2.15 front and 2.50 rear with a 100/80 front and 110/80 or maybe 120/80 on the rear.  That's the same as an RZ350.

For its power and weight, those are arguably one size too large and a 1.85 front rim 2.15 rear might be better for handling but they will look slimmer. That's what was on my race Cb77 and work well.
Title: Re: Project CB350F cafe brat
Post by: Integra99 on Mar 08, 2018, 11:19:18

I agree its why I opted for a slimmer tyre, originally I was wanting a 130 but quickly advised it may look good but the handling would be greatly affected.  I may even put a 90 on the front at some stage.
 
Title: Re: Project CB350F cafe brat
Post by: WhyNot on Mar 08, 2018, 11:50:09
I agree its why I opted for a slimmer tyre, originally I was wanting a 130 but quickly advised it may look good but the handling would be greatly affected.  I may even put a 90 on the front at some stage.

Where did you source those wheels and tires from?
Title: Re: Project CB350F cafe brat
Post by: Integra99 on Mar 08, 2018, 12:03:14

My mate runs the wheel shop for Talon engineering and they run Excel rims - Tyres are Avon AM26
Title: Re: Project CB350F cafe brat
Post by: teazer on Mar 08, 2018, 15:29:23
In the US, I get rims form Mike's XS.com if they have one that's a good match on spoke pattern for similar sized hubs.
Title: Re: Project CB350F cafe brat
Post by: jpmobius on Mar 08, 2018, 16:52:07
Just a thought but that's a light bike and wide tires are not a good match if you like corners.  A better combo might be say 2.15 front and 2.50 rear with a 100/80 front and 110/80 or maybe 120/80 on the rear.  That's the same as an RZ350.

For its power and weight, those are arguably one size too large and a 1.85 front rim 2.15 rear might be better for handling but they will look slimmer. That's what was on my race Cb77 and work well.

This is excellent advice.  The very wide rims you are considering and consequent tires will absolutely KILL the handling of this bike (I have a 400F for reference).  A 90/90 and 110/80 combination will work very well depending on the tire brand.  A 120/80 will be ok on the back if you want a beefier looking tire, but it's a big tire for your bike and the 110 is better in my opinion.   My 400 is a disaster with even a slightly too large front tire, and your 350 likely will be similar.  I have a 90/90 tire on a 1.85 x 18 rim on the front of mine, very noticeably better than the 100/90 previous tire which made turn in awful.  I would not fit larger than a 1.85 front rim.  Of course, you can certainly fit much larger than stock rims and tires and your bike will still be safe to drive, but you will have no chance at all of keeping up with a stock bike in the turns, so if you truly are more interested in building a good handling bike, don't go beyond one size up on the rim width and keep the tires light.  Also, if your 350 is as physically similar to the 400 as it appears, a 3.00 rear rim and tire will very likely interfere with the chain.  I have also bought many rims from Mike's XS and have been very happy with them, though a couple needed some file work to level out the bead seat across the weld.  The stainless spokes are also fine, though it can be tricky to figure out the right length as they sell model specific spoke sets and if your bike is not listed, you are on your own for fitment.
Title: Re: Project CB350F cafe brat
Post by: stubsryan on Mar 08, 2018, 19:42:43
This is excellent advice.  The very wide rims you are considering and consequent tires will absolutely KILL the handling of this bike (I have a 400F for reference).  A 90/90 and 110/80 combination will work very well depending on the tire brand.  A 120/80 will be ok on the back if you want a beefier looking tire, but it's a big tire for your bike and the 110 is better in my opinion.   My 400 is a disaster with even a slightly too large front tire, and your 350 likely will be similar.  I have a 90/90 tire on a 1.85 x 18 rim on the front of mine, very noticeably better than the 100/90 previous tire which made turn in awful.  I would not fit larger than a 1.85 front rim.  Of course, you can certainly fit much larger than stock rims and tires and your bike will still be safe to drive, but you will have no chance at all of keeping up with a stock bike in the turns, so if you truly are more interested in building a good handling bike, don't go beyond one size up on the rim width and keep the tires light.  Also, if your 350 is as physically similar to the 400 as it appears, a 3.00 rear rim and tire will very likely interfere with the chain.  I have also bought many rims from Mike's XS and have been very happy with them, though a couple needed some file work to level out the bead seat across the weld.  The stainless spokes are also fine, though it can be tricky to figure out the right length as they sell model specific spoke sets and if your bike is not listed, you are on your own for fitment.

Thanks for your advice. So the graph says the 90/90 tyre is best suited to 2.15x18 rim. I could do that and get better bike control. As for the rear. I could also use 2.15x18 with a 110/90 or 80 but it is 1 size below standard figment. I have also read that itís better to have a slightly bigger rim than slightly bigger tyre combination   If itís not a standard fit. Furthermore, I canít find a 2.5 rim so I decided to get a 3.0 which works out to be 1 block up from 120/90.

Would you rather 3.0 rim with a slightly smaller tyre match(120/90) OR a a 2.15 rim with a slightly larger tyre match (110/80). Truth be told, I have ordered a 2.15 and 3.0 already but I will put that on hold, depending on what you say. Also didnít want to mix rim brands so basically they are my two options in 18Ē rim sizes. Thanks


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Mar 09, 2018, 05:05:43
Order is on hold pending more info. Thanks a bunch everyone


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Title: Re: Project CB350F cafe brat
Post by: jpmobius on Mar 09, 2018, 11:33:42
In general, I don't think a wider than desired rim is better than a narrower than desired rim, but it seems in my experience that tires of any particular size vary a fair bit depending on the manufacturer especially in cross section.  In other words, a 90/90 x 18 tire from brand x can be distorted much differently than the same tire from brand y on the same wider (or narrower) than optimal rim.  That's just an opinion based on my own experience and is totally non-scientific.  Certainly a tire with a higher aspect ratio (the lower the second number is the higher the aspect ratio) will be more affected since the sidewall will be shorter.  You can imagine how much different the installed cross section of a 110/80 tire will look on a 2.5 or 3.0 rim - how adversely this will impact the performance of the tire is hard to say and no doubt would depend on the manufacturer, but it is not something I would want to do.  That said, I fit a tire that is appropriate to the rim, and if I am determined to fit a wider or narrower tire I change the rim width.  I wouldn't worry at all about miss-matching rims aside from wanting them to look the same. 

Keep in mind that your bike originally came with a 1.6 front and a 1.85 rear (from memory - which never was that great) and drove very nicely.  Going up one size front and back, and fitting appropriate tires is a much more substantial change than may seem to be intuitively obvious as bikes as a rule are fairly sensitive to tire and wheel sizes.  And remember, the wheel weight - which is all unsprung weight is at least as, if not more so, important as tire size and might even be a lot of the impact of fitting larger tires as bigger tires are substantially heavier.  So when you go up just one size in rim width and fit appropriate tires, you are adding both wheel and tire weight both front and back and you can imagine that not being inconsequential.  Plus, adding insult to injury, you will have to run inner tubes on the spoke wheels.  All that extra weight is weight that your suspension has to deal with, and as likely you will be reducing the overall weight of the bike - none of it from the wheels, the unsprung weight ratio will become smaller which works against you even further.  So you have a very strong incentive for making and keeping the wheel/tire package as light as possible. The smaller and lighter the bike, the more important the wheel weight is.  In general, I go up one size in rim width if I am building new wheels, and fit the matching tires.  Part of that is due to the tire size availability.  A 90/90 x 18 tire is a mighty small tire these days!
Title: Re: Project CB350F cafe brat
Post by: stubsryan on Mar 09, 2018, 18:56:16
In general, I don't think a wider than desired rim is better than a narrower than desired rim, but it seems in my experience that tires of any particular size vary a fair bit depending on the manufacturer especially in cross section.  In other words, a 90/90 x 18 tire from brand x can be distorted much differently than the same tire from brand y on the same wider (or narrower) than optimal rim.  That's just an opinion based on my own experience and is totally non-scientific.  Certainly a tire with a higher aspect ratio (the lower the second number is the higher the aspect ratio) will be more affected since the sidewall will be shorter.  You can imagine how much different the installed cross section of a 110/80 tire will look on a 2.5 or 3.0 rim - how adversely this will impact the performance of the tire is hard to say and no doubt would depend on the manufacturer, but it is not something I would want to do.  That said, I fit a tire that is appropriate to the rim, and if I am determined to fit a wider or narrower tire I change the rim width.  I wouldn't worry at all about miss-matching rims aside from wanting them to look the same. 

Keep in mind that your bike originally came with a 1.6 front and a 1.85 rear (from memory - which never was that great) and drove very nicely.  Going up one size front and back, and fitting appropriate tires is a much more substantial change than may seem to be intuitively obvious as bikes as a rule are fairly sensitive to tire and wheel sizes.  And remember, the wheel weight - which is all unsprung weight is at least as, if not more so, important as tire size and might even be a lot of the impact of fitting larger tires as bigger tires are substantially heavier.  So when you go up just one size in rim width and fit appropriate tires, you are adding both wheel and tire weight both front and back and you can imagine that not being inconsequential.  Plus, adding insult to injury, you will have to run inner tubes on the spoke wheels.  All that extra weight is weight that your suspension has to deal with, and as likely you will be reducing the overall weight of the bike - none of it from the wheels, the unsprung weight ratio will become smaller which works against you even further.  So you have a very strong incentive for making and keeping the wheel/tire package as light as possible. The smaller and lighter the bike, the more important the wheel weight is.  In general, I go up one size in rim width if I am building new wheels, and fit the matching tires.  Part of that is due to the tire size availability.  A 90/90 x 18 tire is a mighty small tire these days!
Excellent advice! I will change my order. Hopefully I can find 1.85 for the front and 2.15 for the rear. This bike is a combination of form and functionality with each being as important as the other. Short of that I will get 2.15 front and rear. It just seems really hard to get smaller than 2.15x18 rims on Alibaba. Itís all my budget will allow as Iím running a business with other commitments. Thanks mate


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Title: Re: Project CB350F cafe brat
Post by: farmer92 on Mar 10, 2018, 05:35:55
Was going through Tony Foaleís book ďMotorcycle handling and chassis designĒ
Thereís a whole chapter on tires that makes for an interesting read.
There may be a PDF link floating around somewhere on the web, i recommend reading it.


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Mar 20, 2018, 04:28:10
Thanks for the advice I have rims on the way. Also ordered a pamco electronic ignition with coils, leads and spark plug caps. Couldnít help myself and ordered some rear shocks as well. I got some new carby rubbers which are way over priced. $80! Finally, I have a carb rebuild kit in the way and thatís what Iím working on at the moment. Just split it all down and have it soaking in mineral turpentine at the moment. Itís all filthy! probably going to buy an ultra sonic bath cleaner tomorrow to get them looking clean


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Mar 20, 2018, 04:30:10
The ultra sonic cleaner will help the rust as well I hope 🤞


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Title: Re: Project CB350F cafe brat
Post by: WhyNot on Mar 20, 2018, 06:19:52
Can't hurt it, I would guess....!!!
Title: Re: Project CB350F cafe brat
Post by: Sav0r on Mar 20, 2018, 10:02:08
Hopefully that carburetor is less googly eyed when it comes out of the tank.
Title: Re: Project CB350F cafe brat
Post by: stubsryan on Mar 25, 2018, 02:26:54
Carbs are getting there. Will post photos when they look cleaned up.


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Mar 25, 2018, 02:32:38
So Iím working on the tank at the moment while I can do some grinding during the day. Two areas that I have been putting off are the tank and rear hoop. So this tank isnít original to the 350 so itís being a bit difficult to make look right. I like the shape so Iím determined to make it work. Hereís the issue, I want the bottom line of the tank to run parallel with the seat section. Also it canít foul the side covers. The straight up option is to lift the tank at the front and rear until it all clears the side covers and is level. Thing is, it sits super high up at the steering colum/triple clamp.


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Mar 25, 2018, 02:39:17
Haha and this is what I get when its level 🤦‍♂️ obviously that wonít be happening.


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Mar 25, 2018, 02:42:46
There must be a way but I havenít worked it out. One option is to go with the first picture. Grind the bottom of the tank line till I get the level I want and then tig weld it. If I go to that effort I will get rid of the curve at the back of the tank as per this photo


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Mar 25, 2018, 03:14:13
And this is what I have come up with. Not sure if the front of the tank is too high? Otherwise I find a tank that has the same shape but is smaller. Not sure. Annoying as I have three tanks and none fit


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Mar 28, 2018, 03:29:16
Progress shot. Tank is in place, hoop welded but not cleaned, seat altered but not fixed and new shocks


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Title: Re: Project CB350F cafe brat
Post by: Luugo86 on Mar 28, 2018, 04:44:44
 Hey man, do you have any progress photos of where you cut the frame in the rear, and how u fit/welded up the frame slugs and the hoop? I'm about to do the same thing on a CB350, I don't see it being difficult but any advice/photos from someone who has already done it would be welcome.
Title: Re: Project CB350F cafe brat
Post by: LightsOut on Mar 28, 2018, 12:03:13
Hey man, do you have any progress photos of where you cut the frame in the rear, and how u fit/welded up the frame slugs and the hoop? I'm about to do the same thing on a CB350, I don't see it being difficult but any advice/photos from someone who has already done it would be welcome.

Here's a pretty detailed video of it done really nicely. On a 550 I believe: https://www.youtube.com/watch?v=Mbx3jqKIUbo
Title: Re: Project CB350F cafe brat
Post by: stubsryan on Mar 28, 2018, 20:46:54
Had a quick look at that video. Yeah that should help you. Iím fasting the seat a little differently so I can easily remove it if I ever want to. It will have flat bar bolted to the bottom of the seat. So this will sit down and in a locating grove in the rear where it wonít move and the front flat bar will sit on another aligning flat bar but it will also have adjustable latches to hold it down and tight into place. These latches will be hidden behind the side covers. I will post photos when I do it so people can look closely at my shitty tig welding skills ‍♂️


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Title: Re: Project CB350F cafe brat
Post by: LightsOut on Mar 29, 2018, 04:38:46
Sounds cool, looking forward to seeing that solution. Most just go with bolting the seat on, but making it come off in a nice way is so much more elegant.


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Apr 03, 2018, 10:15:22
Carbs are clean. Mixture screw was suck so I used an easy out which was a pain in the arse. Putting them back together now. New spokes are ordered. $150 from China. 304 stainless. Hopefully they fit. Will get to the seat next unless some valve bolts rock up from the UK.


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Apr 04, 2018, 08:46:51
What a fucked process! Iím still at it. At least, the carbs will be clean, new everything and hopefully a worry free starting and running experience. I donít know how you guys out there get a rebuild done with a missus and kids. This project has taken god knows how many hours and Iím probably only half way! Fark! Oh well, beats watching the lefty project here is Australia. Peace ✌️


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Title: Re: Project CB350F cafe brat
Post by: CrabsAndCylinders on Apr 04, 2018, 13:09:14
That solo seat looks a bit firm.
Title: Re: Project CB350F cafe brat
Post by: stubsryan on Apr 04, 2018, 23:25:14
I have the same seat on my XS750. I havenít found it an issue


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Title: Re: Project CB350F cafe brat
Post by: CrabsAndCylinders on Apr 05, 2018, 00:18:36
I have the same seat on my XS750. I havenít found it an issue


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Ha ha, I was joking about the chair in your last pic.
Title: Re: Project CB350F cafe brat
Post by: stubsryan on Apr 07, 2018, 02:02:58
Ha yeah I missed that one. All good. So Iím wondering if I should make some carbon fibre fenders and electrics box. I watched a couple videos and it seems easy enough. So 2 meters by 800mm sheet is $50 delivered. That would go close to covering both fenders. I would likely paint them black because I canít imagine making them to look perfect however hard I try. Alternatively I use the steel fenders but they are heavy. They will get cut down to a better size but still, it will be heavy


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Apr 20, 2018, 13:45:46
Custom spokes rocked up from AliExpress. They look awesome. So I spent $140 inclusive for all the spokes for both wheels. Prices in Australia were $440 plus post for the same. Fuck that, poor asians need a laksa noodle dinner


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Apr 22, 2018, 08:28:31
Laced up. I have a warp 9? Spoke torque wrench on the way so I can true up the rims. Then tyres. Iím thinking pirelli sport demons


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on Apr 22, 2018, 08:34:37
Engine top end is torqued. I kinda stuffed up though, I used a big torque wrench which had to be set below the markings. I thought it would be accurate but I donít think it was. I stripped about 6 threads on the valve head! Ended up going up 1mm with a tap which worked but was annoying. Carbs are still not done, big case of CBF going on. Might go take the bottom end off to have a look and get the metal out. After that itís getting painted Matt black


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on May 09, 2018, 11:28:27
Iím looking at what pint scheme I should do for the tank and fenders. Probably going matte black with a gloss black stripe but off to one side of the fuel cap, left or right


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Title: Re: Project CB350F cafe brat
Post by: MiniatureNinja on May 09, 2018, 14:51:35
just out of curiousity have you mounted up your master cylinder?
I had those some clip ons and the master cylinder did not work at all at a reasonable angle - I ended up getting new clip ones that were all steel instead of aluminum - comprimise in weight but I could run the stock master cylinder without interference. (this was before I decided to do the remote master cylinder I have now)

i've seen people shave a good amount off the cylinder - or just use a radial master from a modern bike
Title: Re: Project CB350F cafe brat
Post by: stubsryan on May 09, 2018, 18:28:40
I doubt I will go stock, itís a bit big and clunky for me. I will need to consider it soon though. Probably a modern option I think


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on May 10, 2018, 07:23:41
Probably going to order these grips. They look awesome


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on May 10, 2018, 11:26:48
Also deciding about the electrics. Moto gadget looks really good but is really expensive. Iím thinking eastern beaver pc-8. I like the neat form factor of the fuse box for a half reasonable price. Has anyone got any suggestions for some other setup?

https://www.easternbeaver.com/Main/Wiring_Kits/Fuseboxes/PC-8/pc-8.html


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Title: Re: Project CB350F cafe brat
Post by: The Jimbonaut on May 10, 2018, 12:03:07
Man, love those grips.  I ended up using tennis racquet leather grips on my old V Star but these look much better.  Thanks for the posting - got these beauties bookmarked  8)
Title: Re: Project CB350F cafe brat
Post by: farmer92 on May 10, 2018, 14:09:28
http://www.sparckmoto.com/products

Nice FB-11 fuse box
Title: Re: Project CB350F cafe brat
Post by: stubsryan on May 11, 2018, 09:05:41
Fb-11 looks good. Itís nearly double the price of pc-8 though. The fault indication ledís are good, especially with a clear box. Probably will go the pc-8 I think. Cheers though. Iím not sure what size start relay I need. Maybe I will tong test the start motor to see what sort of current it pulls. Iím thinking a 30 amp relay would be ok or can go a 50 amp for an extra $30. No point spending the extra if I donít need it


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Title: Re: Project CB350F cafe brat
Post by: teazer on May 13, 2018, 12:51:40
Also deciding about the electrics. Moto gadget looks really good but is really expensive. I’m thinking eastern beaver pc-8. I like the neat form factor of the fuse box for a half reasonable price. Has anyone got any suggestions for some other setup?

https://www.easternbeaver.com/Main/Wiring_Kits/Fuseboxes/PC-8/pc-8.html


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That's what I used on a couple of custom bikes.  Great product for a simple wiring set up.  I think the Spark Moto unit may also includes relays on the board but check with Matt (Sonrier on this forum) to be sure.

Automotive relays are cheap.  Buy waterproof connectors and relays from Sonrier or Eastern Beaver.
Title: Re: Project CB350F cafe brat
Post by: stubsryan on May 20, 2018, 11:54:22
Iím mostly soldering and heat shrinking as many joins as I can I think.

So I got the carbies done. Engine is in, carbies are on. Pamco ignition is on. Going to try start the old girl this week. If that all goes well, itís all coming back out of the bike for paint. See I needed it in position to finalise the cutting and welding. Lucky beCause my original box of magic was missing a few important bits that I need to make up now. Front engine mount, throttle cable guide, rear engine spacer and bolt. Also trying up the wheels, that sucks! I have spent hours on that! Like heaps of hours. Itís all part of the fun right?, right? Yeah well it beats just paying for it to be done, thatís cheating. Will get some photos and maybe a video through of the bike spluttering with no exhaust! Iím missing more bits! The exhaust collars, will order on eBay soon I think


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Title: Re: Project CB350F cafe brat
Post by: stubsryan on May 21, 2018, 12:19:01
Can you post videos on this app? I canít work it out. I want to show you lads the video of the engine running. So it starts and runs. Bogs down and stalls under acceleration but thatís because the exhaust isnít on or it tuned properly. Still stoked it starts tho. Will be pulling out this week and sandblasting the engine now I know itís ok. Actually heard some squealing from the alternator side but I donít know what to think. Train of thought is to run with it at the moment and see what happens. I couldnít hear it running, only when it was turning over. Could be an issue. Anyway, things are starting to happen, stay tuned
Title: Re: Project CB350F cafe brat
Post by: stubsryan on Jun 03, 2018, 10:02:38
https://youtu.be/uHOnrDPFRfY




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Title: Re: Project CB350F cafe brat
Post by: alpineninja on Jun 08, 2018, 11:43:55
Also deciding about the electrics. Moto gadget looks really good but is really expensive. Iím thinking eastern beaver pc-8. I like the neat form factor of the fuse box for a half reasonable price. Has anyone got any suggestions for some other setup?

https://www.easternbeaver.com/Main/Wiring_Kits/Fuseboxes/PC-8/pc-8.html


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Did you wire up your PC-8 yet? I'm going to attempt mine this weekend.....
Title: Re: Project CB350F cafe brat
Post by: stubsryan on Jun 09, 2018, 23:40:36
Did you wire up your PC-8 yet? I'm going to attempt mine this weekend.....
I havenít got one yet. Neat bit of kit which should make the wiring a bit easier to follow. Thatís why electricians are so anal about making things clean and orderly, it makes fault finding and even doing a bunch more manageable. If you can, you should probably post up your work. Iím keen too see how it all looks mate.


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