O ring placement.

[Tone]

I have a new gasket set, included are some O rings. I know where most of them go, valve covers, barrel, etc, but there are a few that I haven't a clue where they go: In the picture from the right, four very small ones about 1/4" in diameter. To the left of them are another four about 7/8' in diameter. To the left of them are another two about 2" in diameter. I can't find anywhere for them to go and the parts manual shows no such O rings, where the hell do they go?

 

[Tone]

I've just discovered the 2" O rings go behind the points/!advance buckets. The only place I can find for the 7/8" 0 rings is the the rocker shaft plugs but they bunch up when the plugs are tightened so maybe not. As for the little 1/4"O ring, I have no clue. Anybody?

 

[5twins]

I think the small ones may be for the valve guides, not something you normally replace.

 

[5twins]

This may help .....

 

[Tone]

Thanks, but to small with an ID of around 1/8''. I never saw O rings that small when I stripped it, I thought maybe an XS1 or 2?

 

[Wingedwheel]

Could be #6 or #2 in this diagram. Here’s the part #’s