cant identify these o rings

[slayer123]

can anyone identify what these two o rings are? they came in the premium athena gasket kit from mikes xs and i dont know what they are for... i have tried searching and i cant seem to find it. they are the same size too.

 

[Gcraay]

I looked through my Yamaha parts book and the only place I can see they even could go is the rocker arm plugs. The problem is, there should be 4. Maybe your actually missing 2?
I have a gasket set the has some o-rings that could fit on a pencil eraser, but i have not come across where these go. They may be for an alternative engine the kit also fits.

 

[TwoManyXS1Bs]

Could those possibly be for the later camchain tensioner cover cap?

http://www.xs650.com/forum/showthread.php?t=1056

 

[Gcraay]

Ya know, you could be right, but my book shows copper "gaskets".

 

[TwoManyXS1Bs]

Yeah, you may not need them, the kit's trying to fit many models. The pencil eraser sized o-ring(s) may be for the tachometer drive

 

[weaselbeak]

Maybe it's just my eyes, but those look like two slightly different sizes. My guess is that one is for the cam chain tensioner cover.

 

[Stoop22kid]

Is there anywhere that identifies all the gaskets and rings in the gasket kit? Like a couple pictures with descriptions or a list?

 

[TwoManyXS1Bs]

Here's a Vesrah chart.

 

[5twins]

The tach drive o-ring is not included in any of the gasket kits as far as I know. The small ones are probably for the valve guides.

 

[TwoManyXS1Bs]

The tach drive o-ring is listed as:
93210-12154-00 (1.3mm - 11.5mm)
Pretty small...