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06-13-2012 | 02:48 AM

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tande

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From: Millington, MI

RE: ys 91 ac question

Quote:

ORIGINAL: ululi1970

Here's what I found so far:

1) The valve clearance is about 0.05mm, so within specs.
2) at TDC, the timing mark on the camshaft is at the top. Based on the manual, that is where it is supposed to be.

BTW, to inspect the timing I removed the cover to the camshaft and rotate the cranckshaft. Can the timing be accidentally
changed without taking the camshaft out? I do not hink so, and I checked before closing the cover, but just in case.

I will do Four Stroke trick as soon as I can get a pressure gauge from the lab...

Alberto

Not on any "YS" I've had & I've had a bunch (but never a 91AC).....TDC as far as I know is NOT used for cam/timing reference.....the reference dot on the crank/shaft while at BDC is not the same as piston TDC.....FWIW....

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