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Author Topic: CB360's-from build to blog - 2013, MDS (Mo Dumb Shit)  (Read 259760 times)

Offline mysta2

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Re: Yet another CB360 ( or two?)
« Reply #10 on: Nov 08, 2009, 14:52:39 »
+1

Hey PJ if you want to send me your cases I'll send you mine, I'll make yours look pretty if you make mine run pretty :)

Why did you tear out the bottom end and transmission of that 360? Was there anything you needed to replace, upgrade or repair or was it just for cleaning it up and peace of mind? I'm going to have to tear me next one down to swap an (Ebay) CB gearset in to replace my CL gearset. I took all the starter paraphernalia out of Loudbike:



It never occurred to me that I could turn the actual flywheel down.

Offline CrescentSon

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Re: Yet another CB360 ( or two?)
« Reply #11 on: Nov 08, 2009, 16:12:54 »
Damn PJ, taking this serious I see. Should be a great build, and I'm sure I'll waste invest many prime building hrs reading along.
"I hated hipsters before it was cool." -Sonreier

"Lifes a bitch when your trying to sell gold bars to beggars" -VonYinzer

"To say that ALL cafe racers are the same degree of ho hum is like saying that finger banging a fisher price piano is on par with listening to Beethoven." -Kanticoy

Offline crazypj

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Re: Yet another CB360 ( or two?)
« Reply #12 on: Nov 08, 2009, 21:28:50 »
+1

Hey PJ if you want to send me your cases I'll send you mine, I'll make yours look pretty if you make mine run pretty :)

Why did you tear out the bottom end and transmission of that 360? Was there anything you needed to replace, upgrade or repair or was it just for cleaning it up and peace of mind? I'm going to have to tear me next one down to swap an (Ebay) CB gearset in to replace my CL gearset. I took all the starter paraphernalia out of Loudbike:

It never occurred to me that I could turn the actual flywheel down.

I pulled the kickstart mechanism out, bumpstart only (too radical?  8))
 I was going to lighten flywheels but decided its just too much work.
 Haven't had a particularly productive weekend.
Got bottom end re-assembled
 Got cases looking pretty
Got head skimmed 30 thou
 Got cylinders honed to size and today sprayed them with Duplicolour semi-gloss black engine enamel,  (still hate masking stuff  ;D)
I know it works pretty good as I used it on the XS860 motor.
 Amazed at how quick you can chew through a pack of cutting wheels on angle grinder ;D
 Cut up some steel and made a new battery box, in keeping with my recycling ethic, its made from an old industrial shelf that had been thrown out.
 Battery is also recycled, its out of a smoke detector, they have to be changed at certain interval.
 Its 12v 7.5A/hr sealed, has held 12.70 volts for at least last month, I have had it on charge once.
 They are also real cheap when available.
Anyone who has read threads from few months ago knows I don't like battey high at rear (hidden in seat hump)
 I'm mounting it low and center (mass centralisation, its all the buzz in Moto GP, etc  ;D ;D)
While I was at it I cut up some steel angle I bought to make something trick for the XS800 (probably should start a thread for it in Bobbers?)
 May cut back end of frame back off (after I welded extension into it  ::), no planning, its 'evolving' as I go ;D)
 Wasted an inordinate amount of time carving on styrofoam block, decided I want a specific tank shape - don't like what I've carved so will start again in a couple of days, probably use stock tank to get it running.
Did I mention I made fiberglass Kayaks at one time?
I have a little experience with 'glass', but not epoxy resins.
 I'm going to make a fork brace (designing it now) It's going to be similar to onee I made in 1990 for CB400 ( monoshock, 500 conversion, etc, etc)
Need to finish machining the clamps for clip-on's, going to use my idea for bars similar to the XS800 except 'other way up'
 Need to get in touch with Sudco to get new throttle slides for VM's, made new 'low profile' carb tops
 Sorry, no pics of porting.
 It's still too hot in Florida, even though it 'only' got to 80 today.
 Hand is still messed up, need to go back to docs, if only they were not so inefficient and F****** arrogant, I get really pissed off waiting 2 hrs for nothing (it's a a workman's comp thing)

PJ
« Last Edit: Nov 08, 2009, 21:42:50 by crazypj »
'you can take my word for it or argue until you find out I'm right'
I gave my girlfriend an orgasm the other night, but, she spat it back at me
 Some humans would do anything to see if it was possible to do it. If you put a large switch in some cave somewhere, with a sign on it saying 'End-of-the-World Switch. PLEASE DO NOT TOUCH', the paint wouldn't even have time to dry
 It’s not worth doing something unless someone, somewhere, would much rather you weren’t doing it  (Terry Pratchett)
CB360's,  http://www.dotheton.com/forum/index.php?topic=11736.0
XS650,  http://www.dotheton.com/forum/index.php?topic=11922.0

Offline mysta2

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Re: Yet another CB360 ( or two?)
« Reply #13 on: Nov 08, 2009, 23:01:57 »
Do you feel any need to lighten the crank to balance the GS pistons in that 378? Or just run stock?

Offline Kanticoy

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Re: Yet another CB360 ( or two?)
« Reply #14 on: Nov 09, 2009, 00:13:43 »
Great work pj! You've really done your time on these things from the looks of it. It's cOol to see someone put so much time into something like a cb360. You and mysta really show how far you can really take it. I was actually hoping one of you two uys (I know mysta experimented in the past with Teflon) would come up with a viable solution to the ever plaguing cam chain slipper problem in these motors...please tell me you guys have plans in those areas!

I have contemplated the battery in the hump thing to no end too, and I finally came to this conclusion: while it may matter in pure fractional weigh measurements, I can't see how an extra fraction of a pound (mine weighs 10.5 ounces) can make that much of a difference in the weight distribution when it is generally located in the same position as the 150 some odd pounds (or 65 kg) of weight that the pilot is putting in the same area of the bike. I just couldn't ever wrap my head around how marginal the differences could possibly be. But hey I don't claim to be an expert, i just thought you might could provide a little insight to the method behind the madness.

Great attention to detail man...and bump start only huh! That's hardcore!
I get not knowing, but I can't for the life of me understand not trying. It's only metal it can be fixed. Man up and risk a mistake in exchange for a lesson.
'

Offline sebatron

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Re: Yet another CB360 ( or two?)
« Reply #15 on: Nov 09, 2009, 00:48:38 »
it's nice to get an insight on what the resident master gets up to :)

bump starting probably looks more majestic than kickstarting, at least thats how id justify it to myself.

just out of curiousity, how much meat can you take out of a cylinder wall with the ammco hone? is it literally for the .0*'s of an inch, or can you get a few millimetres out? say, 2mm out of an alloy wall?

Offline boingk

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Re: Yet another CB360 ( or two?)
« Reply #16 on: Nov 09, 2009, 01:02:08 »
Very nice work, I'm mighty impressed. I was thinking of doing something like this to one of the smaller Hondas and then enter the vintage racing scene. You have any plans for racing, or is this just for kicks? Either way, good stuff man.

Meanwhile, the placement of perhiperal weight has a huge difference on how a bike turns. More specifically, how much effort you need to exert and how fast it will change direction. Place weight at the centre of gravity and it will have negligible effect on the handling capabilities of a vehicle. Place it further away and you start to deal with more complex things like directional inertia.

Try it for yourself, go for a run through the twisties with something with a bit of weight strapped securely to the tail of the bike (a half-gallon water container, perhaps, or a house brick). Now, remove the object and go for the same run. You'll notice a difference for sure.

Cheers - boingk
Current:'14 CB125e, '77 TS185, '90 XR600R, '00 VTR1000FPast: CBR1000F, GSX-1100EF, CBR250R, CBR125R, GS850G, RS125, DR-Z400E

Offline diesel450

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Re: Yet another CB360 ( or two?)
« Reply #17 on: Nov 09, 2009, 12:11:02 »
Reading this makes me feel like I'm in school, in a good way ;). Thanks for taking the time to share this with the rest of us!

Offline crazypj

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Re: Yet another CB360 ( or two?)
« Reply #18 on: Nov 09, 2009, 20:35:37 »
it's nice to get an insight on what the resident master gets up to :)

bump starting probably looks more majestic than kickstarting, at least thats how id justify it to myself.

just out of curiousity, how much meat can you take out of a cylinder wall with the ammco hone? is it literally for the .0*'s of an inch, or can you get a few millimetres out? say, 2mm out of an alloy wall?

 you don't  really want to take more than 0.010" or so with a hone, too much like hard work.
You could tak 0.020~0.030" if you use 80 grit stones and a honing tank with constant flow of honing oil.
 Its so easy to bore alloy its not worth the effort to try honing, except for final size
 If your taking out 2mm, its much faster and easier to bore it.
I did seveal bores back in 1974 with a Bridgport mill, just about any machine shop will have at least one and generally be more amenable to boring small sizes,
Automotive places usually won't touch bike parts, "too small, we dont have anything that goes down that far" or similar.
 Bike shops have been known to charge for multiple bores ( at $25~$35 a bore, 2mm could be 8 oversizes)

 Anyway, I'm going to make this one a bump-start bike, if its too inconvenient, I'll just swap motor out of the 'dyno' bike (its already ported, skimmed head and 378cc)
 It just wont look very pretty but its not a big deal to strip top end off and clean things up same as motor I'm now doing.
 I have to change clutch on it sometime soon whatever I do, its no good to man nor beast  with slipping clutch.  ;D

PJ


« Last Edit: Oct 11, 2010, 01:56:10 by crazypj »
'you can take my word for it or argue until you find out I'm right'
I gave my girlfriend an orgasm the other night, but, she spat it back at me
 Some humans would do anything to see if it was possible to do it. If you put a large switch in some cave somewhere, with a sign on it saying 'End-of-the-World Switch. PLEASE DO NOT TOUCH', the paint wouldn't even have time to dry
 It’s not worth doing something unless someone, somewhere, would much rather you weren’t doing it  (Terry Pratchett)
CB360's,  http://www.dotheton.com/forum/index.php?topic=11736.0
XS650,  http://www.dotheton.com/forum/index.php?topic=11922.0

Offline Big Rich

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Re: Yet another CB360 ( or two?)
« Reply #19 on: Nov 13, 2009, 22:48:38 »
Good looking work PJ! You said that battery is out of a smoke detector? I've never seen one that big. Or maybe it's just the picture blowing it out of proportion in my head.

I was having a problem with the battery on my Suzuki (too cheap to replace it) so I was bump starting for about a week back and forth to work. Luckily my house is on top of a hill and the parking lot at work also has a hill. But everybody thought I was "too good" to park next to the Harley's!