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Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions.
Photo by Alessio Corradini, on the Salar de Uyuni, Bolivia, of two locals

I haven't been everywhere...
but it's on my list!


Photo by Alessio Corradini,
on the Salar de Uyuni, Bolivia,
of two locals



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  #16  
Old 31 Jul 2020
dzl dzl is offline
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Join Date: May 2012
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Quote:
Originally Posted by turboguzzi View Post
i meant he shouldnt reuse a gasket that already has been leaking compression like in his case, no way it going to work well again

DZL, if you had just some oil leak, i can understand reusing it...

but it's apples and oranges...



the cam chain wheel on the crank is a super strong press fit on the shaft, there is no keyway, not sure why you are saying this
never ever saw one that shifted. sounds like something is wrong in RSC's alignment process
Agreed in this case will need a new head gasket, just on general pull down I have reused.

Who said the crank cam gear has a key? Not me. The flywheel has a key. From experience, the flywheel on my TTR600 moved on the crank after the key snapped. The flywheel nut was not as tight as it should be on disassembly so that may have been the cause, but it spun that much the bike wouldnt run at all. The key actually snapped and flywheel moved about 5mm from where it was supposed to be. No I have never seen a cam gear slip but it is a remote possibility.
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  #17  
Old 31 Jul 2020
dzl dzl is offline
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Quote:
Originally Posted by RealSpaceCowboy View Post
I won’t be reusing the hg. I have another on the way. Also can you explain what rsc alignment process is? I basically just ignored the flywheel markings and found tdc myself.
as you turn the crankshaft anti clockwise the first marks like a H are the timing marks. As you turn slightly further, the next mark is the TDC. If you think TDC is still marked incorrectly then you will need to remove flywheel. there is an arrow marked on the crankcase and the dot on the crank cam gear that should line up. Best done with dial indicator on the piston to work out exact true piston TDC.
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