DO THE TON

Blood Sweat Tears and Grease => Projects => Trackers => Topic started by: Psycrow on Jun 14, 2016, 12:18:46

Title: 78 XS 750...special to tracker/scrambler
Post by: Psycrow on Jun 14, 2016, 12:18:46
So my main bike is a 2015 Mag wheel Bonneville but here in Nova Scotia we have some beautiful scenery along the fundy shore bit it's all only accessible from grated gravel and fire roads. After banging my exhaust on the bonnie a couple of times I figured I better look at something else for my off road adventures. Well in the garage I had this 78 XS750 triple that I was thinking about a café build for but the "Special" version of this bike that was more popular here in Canada than the " standard" version  the UK enjoyed made a cafe build more expensive and difficult.  So a tracker/scrambler build began to take shape in my mind.
I've lurked here a while so I thought it was time for a build thread. Now I didn't take many pictures of the starting point but here are 2 to kick off the build.
(http://uploads.tapatalk-cdn.com/20160614/33a21d2ad9deb4d134cfe0b1be9e95c0.jpg)
Earliest pic I have of my starting point.

I've since stripped it down some. This is not going on be a frame up powder coat restoration at least not yet. I don't have the funds at this point and the motor is in dubious health so ill get it on the road and see how it goes before I commit to a complete teardown... maybe over the winter.
I touched up the frame with Tremclad, cleaned up the forks and painted the lowers. fork seals are not leaking yet so a complete rebuild will come later. Cleaned up the triples with much rust removal and new paint, it has tapered roller bearings already and they were in decent nick so they were washed in wd40 then repacked with grease. Forks will see new ears and gaiters. Headers were sanded and painted with VHT header paint... may get wrapped later. Rear fender was bobbed but the plastic inner fender was cleaned and retained. This in not California and this bike will see bad weather so I want to maintain some crud protection. Stock airbox was in rough shape so it is getting pods (yeah yeah i know). Seat pan was completely rotted so it was trimmed and will be covered in plastic and used as a fiberglass template for a brat style seat.
I'm cheap so I reworked the stock tail light and I'm looking for signal light that will work with the look I'm after.

(http://uploads.tapatalk-cdn.com/20160614/2cbfdc6ec2d4a995cccc9fa67f19d1d1.jpg)

Also got longer shocks from a triumph Thruxton to bring up the rear to improve the lines and balance the longer "Special" edition stock forks. Will also increase ground clearance.
(http://uploads.tapatalk-cdn.com/20160614/ff6ff3a6fd10f8002799cf6028ced221.jpg)

Here's how it sits now...

Psy

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Title: Re: 78 XS 750...special to tracker/scrambler
Post by: datadavid on Jun 16, 2016, 15:34:12
Thats cool! I still have my stock thruxton shocks lying around, maybe i can make mine a bozochop-scrambler? 😀
Title: Re: 78 XS 750...special to tracker/scrambler
Post by: NoRiders on Jun 16, 2016, 16:44:30
Looks like a good project making progress, cool.

If you're thinking about changing the tyres, it'll end up looking a lot like my CBX550, full guards due to UK spring/summer/autumn/winter rain :-(

(http://i77.photobucket.com/albums/j60/LemonBUG/20160519_172913_zps7fsz2kbp.jpg) (http://s77.photobucket.com/user/LemonBUG/media/20160519_172913_zps7fsz2kbp.jpg.html)
Title: Re: 78 XS 750...special to tracker/scrambler
Post by: Psycrow on Jun 16, 2016, 21:58:05
Oh yea these tires are all dry rotted they are just on it so I can roll it around the garage. It's getting some dual sport rubber. As of right now I'm thinking Shinko 705 's or some Hidenaeu Scouts. This bike will be doing gravel roads.

Psy

Ps. I've been watching your build Noriders looks sweet I love the CX's!

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Title: Re: 78 XS 750...special to tracker/scrambler
Post by: Psycrow on Jul 06, 2016, 12:13:19
Some minor updates. Got the headlight bucket painted and mounted with some generic ears. Tank was derusted, found some pin holes around the filler cap so out came the MIG ( no pics because my welds are ugly). It got some minor bondo and a thick coat of primer to tell me where to spot putty. The fiberglass seat was trimmed and cleaned up some then wire frames added form the rear shape for stage 2 of the fiberglass. Front brakes are also rebuilt and back on.(http://uploads.tapatalk-cdn.com/20160706/be8af3628509461cc0076f71e7d9d877.jpg)
(http://uploads.tapatalk-cdn.com/20160706/587d43cb6a2bb0642af22be5cb2e73e6.jpg)
(http://uploads.tapatalk-cdn.com/20160706/c978fcf184f4478f12ad47e88bcf7925.jpg)
(http://uploads.tapatalk-cdn.com/20160706/b0b65fd47b20f65d3363d483cf62d521.jpg)

That's it for now... next job will be to wet sand the tank spot putty any little spots and start applying primer and topcoat.  Then rebuild the petcocks converting them to manual (vacuume elimination).

Psy

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Title: Re: 78 XS 750...special to tracker/scrambler
Post by: JadusMotorcycleParts on Jul 06, 2016, 15:11:19
This is gonna be great man!
Title: Re: 78 XS 750...special to tracker/scrambler
Post by: Psycrow on Jul 06, 2016, 17:15:28
Thanks! I realized I haven't really posted many progress pics so here are a few..
The tail chop....(http://uploads.tapatalk-cdn.com/20160706/03ed1cc3b84a4b5e3dfe2fd298d81f17.jpg)
Rough...
(http://uploads.tapatalk-cdn.com/20160706/aea9d0ee7ad8ebac07e08fed553664f5.jpg)
Much cleaner...


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Title: Re: 78 XS 750...special to tracker/scrambler
Post by: Psycrow on Jul 06, 2016, 17:18:13
(http://uploads.tapatalk-cdn.com/20160706/2252b6f00d95242566463084653a75d8.jpg)
Cleaning up and painting the triples and the the forks.
(http://uploads.tapatalk-cdn.com/20160706/4ccf4456fab91b1034452955594ec5d2.jpg)
Stage 1 of fiberglass seat pan..

Psy

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Title: Re: 78 XS 750...special to tracker/scrambler
Post by: Psycrow on Jul 06, 2016, 17:23:05
(http://uploads.tapatalk-cdn.com/20160706/13fbbb371c13ca4b4abe741eab952fa2.jpg)
Ready for trimming..

And a pic of the 1980 Goldwing 1100 I did two years ago.
(http://uploads.tapatalk-cdn.com/20160706/ccb57e288f2851b347b35285c0d1a632.jpg)

Psy

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Title: Re: 78 XS 750...special to tracker/scrambler
Post by: Psycrow on Jul 15, 2016, 08:37:41
Some more progress. Got the tank painted.(http://uploads.tapatalk-cdn.com/20160715/4fa0de21205da8ecff6e17ef99b02cd4.jpg)
But I think it needs something more than just a solid color.. Yamaha logo in black or white maybe and some sort of stripe maybe?
(http://uploads.tapatalk-cdn.com/20160715/81798301bcdb7488414f822206692c6e.jpg)

Got the rear brakes back on so the next step is to get some fluid in there and bleed. I rebuilt the petcocks but at least one is from a different year later 850 maybe... in any case in converting them to manual following the guide on triples.org I still buggered one up and drilled through the casting. I think it will still work in off and on position for the short term but I think I will bite the bullet and get a couple of new ones from Mikes xs. Net. Starter button is broken in the switch housing so that need repaired and the clocks are apart getting some flat black. There is some rust damage to the chrome cups that I made a quick and ugly repair to with the MIG but I slapped paint all over it anyways as I don't think they are staying long term. New fuel lines and inline filters for extra protection  for those clean carbs and its time to test that tank and petcocks next... see if she will fire. Still have to do something with the exhaust mufflers and get back to that seat!

Psy
I'll take more pics I promise..

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Title: Re: 78 XS 750...special to tracker/scrambler
Post by: NoRiders on Jul 15, 2016, 08:44:40
It's looking tidy now. Tank could do with something, you're right. Yamaha stripes would work, maybe stylised and stretched a bit?

I've just compounded my rattlecan painted tank and it's come up rather well.

What's your plan for side covers?
Title: Re: 78 XS 750...special to tracker/scrambler
Post by: Psycrow on Aug 01, 2016, 15:39:31
Got antsy put some fuel in the tank and fired it up... cleaned up petcocks were leaking like a siv... local guy has several of these XS'S and gave me a couple of used ones off of a 850. left still has a small leak but they are way better than the two mismatched beat up ones I had. Took some cranking (I think my starter clutch is in need of some tlc and the starter switch is busted) but I got it running for the first time is over a year. Carbs will probably need another cleaning and a sync but she is growling pretty. Number 3 header is cooler than the other two tho so that will have to be investigated. Also I seem to have some bad connections in the loom as the lights don't always come on with the Key. I strongly suspect the manky looking non origional fuse box. I think I will cut it out and wire in individual weather proof inline mini blade fuses.
As for the tank I think Yamaha in white with some kind of vertical black stripe will do then I think I will distress it to make it look like painted on military lettering clear coat with some mat clear I have... I have the original left side cover so it will be cleaned up and used but the I'm missing left. I have an idea for a military surplus bag to be mounted in its place to give me some storage for paperwork and sunglasses and a tool or two.

Psy

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https://vimeo.com/177125014 (https://vimeo.com/177125014)
Title: Re: 78 XS 750...special to tracker/scrambler
Post by: Psycrow on Aug 25, 2016, 16:26:07
Some minor progress yesterday.  Front brakes installed and bled however the rear does not seem to want to bleed. Master seems like it's sealing but it's not pumping and filling the line..
Some minor bits painted black.
Curiserish slash cut exhaust was trimmed flat.

 (http://uploads.tapatalk-cdn.com/20160825/1acea0466e0b1d2ff8f33df8d1d87acb.jpg)
They were test fitted but will need be pulled back off for paint.
Most work was done on the seat. Old foam was reused with much trimming and shaping to the new made by me Fiberglass pan. (first time fiberglassing so be kind) (http://uploads.tapatalk-cdn.com/20160825/ac2ec3fc09c9ca00eecfeac2365454e2.jpg)
(http://uploads.tapatalk-cdn.com/20160825/753877ec557cceb9b18bce3c96a8080f.jpg)
(http://uploads.tapatalk-cdn.com/20160825/74bfbfa3252395219be19754491617f3.jpg)
 
as it sits now.
(http://uploads.tapatalk-cdn.com/20160825/e5ebe0d5b51bdacc3eba664573f8ff74.jpg)

Psy

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Title: Re: 78 XS 750...special to tracker/scrambler
Post by: XS750AU on Sep 07, 2016, 03:06:50
Hi Psy
You look a lot closer than me getting it on gravel. What tyres are you planning to get. There appear to be a reasonable selection for rears but not much for fronts!
Cheers
Tim

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Title: Re: 78 XS 750...special to tracker/scrambler
Post by: Psycrow on Sep 08, 2016, 13:21:33
Hi Psy
You look a lot closer than me getting it on gravel. What tyres are you planning to get. There appear to be a reasonable selection for rears but not much for fronts!
Cheers
Tim

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I'm looking at some combo of Shinko 804/805's or Kenda 700 series... have some issues finding a matched set in stock sizes however... tough to play with over sizes as well as there is very limited space between the tire and the drive shaft

Psy
Title: Re: 78 XS 750...special to tracker/scrambler
Post by: XS750AU on Sep 08, 2016, 19:08:52
Yes, a lot easier to get road tyres! Very difficult to find a 90/90 x19 for the front. Looks like it will end up being 100/90 up the front. The rear should being standard at 4.00 which is only 100mm! There are bugger all 18" rears down to 100mm. 110 and 120 are about as small as they go! What width are you going to try?
Thanks
Tim

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Title: Re: 78 XS 750...special to tracker/scrambler
Post by: Psycrow on Sep 09, 2016, 00:46:55
Not sure yet. Probably 100/90 on the front or 100/80 if I can find one. Rear is an issue. It has a set of Kenda Challengers on it now and the rear is a 120/90 and there is about 2/8s of an inch between it and the drive shaft. Ill update the thread when I decide.

Psy
(http://uploads.tapatalk-cdn.com/20160909/0eee03311ea8eec6902e21238d82de65.jpg)

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Title: Re: 78 XS 750...special to tracker/scrambler
Post by: JadusMotorcycleParts on Sep 09, 2016, 05:32:53
I got a 120 avon road rider on the one I built and it was tight.  But there was enough clearance and it rides real nice.  Pretty crazy that stock was only 4"/100mm.
Title: Re: 78 XS 750...special to tracker/scrambler
Post by: TranceMachineVienna on Sep 09, 2016, 08:02:00
i´m so in for this!
Title: Re: 78 XS 750...special to tracker/scrambler
Post by: Psycrow on Sep 09, 2016, 08:35:12
wow Jadus where can i see more pics of that bike?!?

Psy

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Title: Re: 78 XS 750...special to tracker/scrambler
Post by: Psycrow on Sep 09, 2016, 09:16:28
Oh and BTW just in case any of you guys working on XS's hasn't seen this thread on what tire size works over on Yamaha Tripples here it is.
http://www.yamaha-triples.org/forums/thread-view.asp?tid=16390

Psy
Title: Re: 78 XS 750...special to tracker/scrambler
Post by: JadusMotorcycleParts on Sep 09, 2016, 12:14:10
Wow, sweet link with all the tyres that fit!  This would have been helpful when I was deciding  :o

Yeah sure, heres a link to a bit of a write up about the bike: 

http://www.jadusmotorcycleparts.com/jadusbikes
Title: Re: 78 XS 750...special to tracker/scrambler
Post by: XS750AU on Sep 09, 2016, 19:38:38
Hi Guys
The only concern I have is that the data is for road tyres and the specified dimensions are on the carcus  not the tread. 120/80 - 18 appears to be the most widely available size, but as you guys have found it only just fits and we are wanting scrambler tyres with a more aggressive tread. Just a bit worried that the outside knobs could cause a problem on the 120s?
I am also running Avon Roadriders M23s on my 750 but I did go for the XS spec 3.25" front and 4.00" rear - great tyres.
The Avon Trailrider M53 looks a great option but the front only goes down to 100/90 with rears at 110/80 or 120/80. Hopefully if a 120 M23 fits then a 120 M53 will also fit.
The other option I was getting interested in is the Pirelli Scorpion AT90, the 120/80 -18 is widely available but even though they list a 90/90 - 19 front, I cannot locate one anywhere????
And a miss-match of Dunlop D604 120/80 – 18 & Bridgestone TW101 100/90 - 19
Guess it is a first world problem though!!!!
Watching with interest as to how we all go.
Cheers
Tim
Title: Re: 78 XS 750...special to tracker/scrambler
Post by: Psycrow on Sep 10, 2016, 08:55:57
Yes the knobbies are a concern I think ill risk the 120/80 18 and if it rubbs ill end up grinding the swinger a little and/or shaving the tire blocks slighlt... Im hoping the amout of material that needs removed will be minimal.. I dont mind massaging a little but I dont want to compromise safety. It will be bridge ill cross when i have to..... for now I HAVE to get this seat done and the front brakes sorted... arg..i need a couple of uninterrupted days....

Psy

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Title: Re: 78 XS 750...special to tracker/scrambler
Post by: XS750AU on Sep 12, 2016, 05:29:56
Psy
Don't think I would grind the swingarm. Hit with a hammer would be OK, but removing metal will weaken it. I am looking at a second hand Pirelli Scorpion MT90 A/T 120/80-18 to check clearances. Then measure the clearance between drive shaft and swing arm wall. Make up a dolly so I can hammer down the wall to a fixed point controlled by the dolly. That's the theory anyway.
Whatever you do don't grind the swingarm!
Cheers
Tim
Title: Re: 78 XS 750...special to tracker/scrambler
Post by: Psycrow on Sep 12, 2016, 18:06:21
There is a local guy who has about 5 750's and 850's in parts and hes sold/given me some parts along the way to help with this build. He says the 850 swingarms will bolt up and are wider he also says  there are several from other Yamaha models of the same aera that will work with some minor modification ie: some virago and Maxim models... I wasn't anywhere near that stage last time I talked to him so I didnt get details but I may go back and pick his brain a little bit. I wouldnt grind on the swing arm without some additional bracing... im a long way from that at this point a
in any case...for now i just want to get it going down the road under its own power ..

Psy

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Title: Re: 78 XS 750...special to tracker/scrambler
Post by: Psycrow on Oct 17, 2016, 00:34:18
A few updates. Finished the seat and its now mounted. Didn't turn out the way I wanted but fo never doing anything like this before Im happy enough with it for now. front brakes are bled and working now after a rebuild/mod on a brand new cheap chinese ebay master... signal flasher sorted homemade right side cover fitted with army surplus tool bag... ( it is not in the way at all) new Biltwell grips on and crappy mirrors on for inspection and until I decide what to do there. Moded petcocks and fixed leaks. Took it for a little shake down cruise it ran OK sounds nice but now begins the task of rejetting and fine tuning the carbs. Also might have been a miss towards the end of the ride so I will have to retest the coils when they are warm.

Psy
(http://uploads.tapatalk-cdn.com/20161017/ae552151b458fb66d1998f9f34aee9e0.jpg)(http://uploads.tapatalk-cdn.com/20161017/33c2f62b39fdba6b9dff0aa8f12b2267.jpg)(http://uploads.tapatalk-cdn.com/20161017/238ad42ee1274dc2f360e3cd2980bb10.jpg)

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Title: Re: 78 XS 750...special to tracker/scrambler
Post by: XS750AU on Oct 17, 2016, 04:12:04
Great to see her up and running. I wasted a lot of time and effort tuning jets by not sorting the air leaks first, on the carbi rubber mounts and throttle shaft seals. If you take the rubber boots off and squeeze them - if there are any visible cracks then in the bin. Check the throttle shaft seals - they should be soft, mine were hard as a rock.
Any missing or back firing can be caused by a lean mixture = pods + possible air leaks.
Any progress on new tires?
Cheers
Tim
Title: Re: 78 XS 750...special to tracker/scrambler
Post by: NoRiders on Oct 17, 2016, 06:37:17
A few updates. .... homemade right side cover fitted with army surplus tool bag... "

Psy
(http://uploads.tapatalk-cdn.com/20161017/ae552151b458fb66d1998f9f34aee9e0.jpg)(http://uploads.tapatalk-cdn.com/20161017/33c2f62b39fdba6b9dff0aa8f12b2267.jpg)(http://uploads.tapatalk-cdn.com/20161017/238ad42ee1274dc2f360e3cd2980bb10.jpg)

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"you will find that is about the worst place you could put a bag ,there right in your way,unless it is just a sidecover painted like a bag you will always know its there anoyingly it even is a hazxard there and takes away control of the bike
what the hell is good about it ?the location?
it even looks ridiculous having them in your way
the normal location for the saddlebags/luggage bags is a great solution for such rertardedness of mounting them smack dab in your way
you know what it looks like ? like some queer interior decorator who knows zip even how to shift gears, dressed up a motorcycle
not that i have anything against anybody but it looks that fucked up and is
if you tucked them in flush so you wouldn't constantly feel them right IN THE WAY where your leg wants to ber and there was no buckles to catch a pant cuff or shoelace on, that would be different but having them bulked out right in your way is one of the stupidest deals i have seen yet
fcking snap out of it dudes,before you venture into public with the worst bag location ever concieved"
Title: Re: 78 XS 750...special to tracker/scrambler
Post by: datadavid on Oct 17, 2016, 08:49:40
"you will find that is about the worst place you could put a bag ,there right in your way,unless it is just a sidecover painted like a bag you will always know its there anoyingly it even is a hazxard there and takes away control of the bike
what the hell is good about it ?the location?
it even looks ridiculous having them in your way
the normal location for the saddlebags/luggage bags is a great solution for such rertardedness of mounting them smack dab in your way
you know what it looks like ? like some queer interior decorator who knows zip even how to shift gears, dressed up a motorcycle
not that i have anything against anybody but it looks that fucked up and is
if you tucked them in flush so you wouldn't constantly feel them right IN THE WAY where your leg wants to ber and there was no buckles to catch a pant cuff or shoelace on, that would be different but having them bulked out right in your way is one of the stupidest deals i have seen yet
fcking snap out of it dudes,before you venture into public with the worst bag location ever concieved"
Rolling on floor laffin my ass off. Not really but funny tho :D and your right.
Title: Re: 78 XS 750...special to tracker/scrambler
Post by: Psycrow on Oct 17, 2016, 11:17:10
hmm. that response seems soo familiar some how.....and maybe I AM a gay decorator and that hurt my feelings...

Psy

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Title: Re: 78 XS 750...special to tracker/scrambler
Post by: zap2504 on Oct 17, 2016, 11:52:10
Arrogant but accurate. The bag is too big and is in the way. A functional alternative would be a triangular tool bag/roll made to fit in that specific area and inset so as to not be in the way. Otherwise a side cover to hide the battery would be better.
Title: Re: 78 XS 750...special to tracker/scrambler
Post by: NoRiders on Oct 17, 2016, 11:59:23
hmm. that response seems soo familiar some how.....and maybe I AM a gay decorator and that hurt my feelings...

Psy

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I'm sure you recognise the rant I posted Psycow haha  ;)

FWIW I think the saddlebag looks OK.

It does look a little baggy and might get sucked into the rear wheel? Perhaps a metal stiffener fixed along the inside bottom edge would keep it stiffer (phnaarrr) and allow you to fix it to the frame/bike in some way?
Title: Re: 78 XS 750...special to tracker/scrambler
Post by: Psycrow on Oct 17, 2016, 12:13:07
Indeed I did... and caught the joke... im not actually a queer interior decorator (not that i have a problem with that lol). The bag was a military but pack and the straps you see going around the frame are just to keep the lid from drooping. It has velcro straps in the back that would have secured it to the web belt.. I cut slots in the side covers sheet metal and fed these through and secured so the bag is not going anywhere even when packed. I have an identical pack on the tail rack of my Bonneville... its done 12k kms and never budged. In addition the stock plastic side covers were curved out the sheet metal one I made is flat and tucks in as close to the battery box as it can so the bag protrudes as little as possible.

Psy

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Title: Re: 78 XS 750...special to tracker/scrambler
Post by: Psycrow on Oct 17, 2016, 12:57:38
Also I swapped some work for a set of Dunlop k70 tires.. not exactly the knobbies I would like but the price was right ;) and they should handle dirt fire roads well enough for now. I just need to pick up tubes for them. According to the Yamaha tripples forum my rims are not tubless anyways which could explain why they need air every couple of weeks. I assumed all mags were tubeless however according to that site the 77 and most 78 mags were to porus to hold air indefinitely and tubes were required... if mybmags were tubless they will actually be stamped "tubless" on the spokes. Should have the k70s mounted soon but the weather is turning fast here and with my limited budget some stuff including all the road legal fees and paperwork may have to wait till spring.

Psy

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Title: Re: 78 XS 750...special to tracker/scrambler
Post by: Psycrow on Oct 20, 2016, 14:43:06
Well she got a good 30 min skake down cruse today.
(http://uploads.tapatalk-cdn.com/20161020/57db0558e26aa08caf78a7664dc0bb73.jpg)
She started hard and ran rough with no power at low throttle openings.   I think Ill have to dig into the carbs again and the other petcock has sprung a leak (more of a weep but the 1st one i fixed seems to be holding). When I got home there was a steady stream of white smoke from the crank case breather (like a lit cigarette) and i may have a base gasket leak. I never noticed this before but it looks like a little chunk out of the casting at the base gasket right behind the no 1 header pipe...(http://uploads.tapatalk-cdn.com/20161020/826ce6479c930e7375703b2c2da1d7e4.jpg)
 sigh i was really hoping this was not going to require a complete engine teardown....

Psy

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Title: Re: 78 XS 750...special to tracker/scrambler
Post by: HerrDeacon on Oct 20, 2016, 15:16:18
I could be wrong, I've never worked on a Yamaha before, but I believe that is not a missing chunk but there by design (drainage?). Someone more experienced in Yamaha's may chime in on it.
Title: Re: 78 XS 750...special to tracker/scrambler
Post by: advCo on Oct 20, 2016, 15:20:39
The 'smoke' out of the crankcase breather is normal, its water vapor that 'steams' off the oil when the engine is at temp. Factory airboxes usually have the breather air recycled into the airbox so you never see it.
Title: Re: 78 XS 750...special to tracker/scrambler
Post by: Psycrow on Oct 20, 2016, 16:47:29
I could be wrong, I've never worked on a Yamaha before, but I believe that is not a missing chunk but there by design (drainage?). Someone more experienced in Yamaha's may chime in on it.
Ill dig into this a little more over on the tripples forum.

And I know about the water vapor .. this seemed more than normal but that could be an excess of moisture in the oil from sitting so long and the cooler fall temps here now.. I have fresh oil and filter so ill go ahead with a fluids change and see how she goes..

Psy

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Title: Re: 78 XS 750...special to tracker/scrambler
Post by: JadusMotorcycleParts on Oct 21, 2016, 05:29:42
I don't know about that exact spot but I have seen similar details cast into yamaha crankcases - for lodging in a wedge and prying them apart (to break stubborn gasket cement).  But yeah, seems odd just there?
Title: Re: 78 XS 750...special to tracker/scrambler
Post by: beachcomber on Oct 21, 2016, 07:02:50
I don't know about that exact spot but I have seen similar details cast into yamaha crankcases - for lodging in a wedge and prying them apart (to break stubborn gasket cement).  But yeah, seems odd just there?

+1 on that - same on quite a few Japanese makes - including my KZ750 (twin) ........
There's actually a pic in the workshop manual with a pry bar being used !!
Title: Re: 78 XS 750...special to tracker/scrambler
Post by: XS750AU on Oct 21, 2016, 19:08:31
I don't know about that exact spot but I have seen similar details cast into yamaha crankcases - for lodging in a wedge and prying them apart (to break stubborn gasket cement).  But yeah, seems odd just there?

Exactly correct, there are 2 points cast into the cylinders to help split it away from the cases if the gasket gets stuck.

Also attaching a document that is a collection of posts on tuning carbies which might help you with your carbies
Good luck
Tim
Title: Re: 78 XS 750...special to tracker/scrambler
Post by: Psycrow on Oct 23, 2016, 19:29:21
Thanks for the pics and info... Lets hope its the left side engine cover leaking then and not the base gasket...

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Title: Re: 78 XS 750...special to tracker/scrambler
Post by: datadavid on Nov 02, 2016, 16:00:32
I don't know about that exact spot but I have seen similar details cast into yamaha crankcases - for lodging in a wedge and prying them apart (to break stubborn gasket cement).  But yeah, seems odd just there?
Exactly, those are pry points, even says so in the workshop manual! :) im guessing by your intake/exhaust setup and no power at small throttle openings you have not raised the needles? Mine needed to come at least one notch up with pods and 3-1 2" exhaust.
Title: Re: 78 XS 750...special to tracker/scrambler
Post by: datadavid on Nov 02, 2016, 16:01:34
The 'smoke' out of the crankcase breather is normal, its water vapor that 'steams' off the oil when the engine is at temp. Factory airboxes usually have the breather air recycled into the airbox so you never see it.
Yes if its not worse than a lit cigarette its perfectly ok. Just put a filter on there.
Title: Re: 78 XS 750...special to tracker/scrambler
Post by: Psycrow on Nov 03, 2016, 21:07:07
filter is on the crankcase breather hose. Carb adjutment is next then I need a decent day for another test ride, getting cold and wet here. Exhaust is stock 3 into 2.

Psy

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Title: Re: 78 XS 750...special to tracker/scrambler
Post by: Psycrow on Nov 13, 2017, 18:02:06
To close this off unlike so many threads here this project was 99% finished and the bike was running well (maybe still needed some fine tuning with the jets for the pods) and then sold off to fund the next project.....

Yamaha 77' XT500

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