Wednesday, June 22, 2011

CM91: No Clearance for You!

After a little help from the CT90 forums I finally figured out what I need to be measuring for valve clearances.  Note that Clymer's seems to be completely out in left field when they say that you should measure between the rocker arm and the camshaft lobe.

You're actually measuring between the bottom of the rocker arm and the top of the valve stem (if you were looking downwards at the intake).  But it was especially confusing for me at first because the clearance on the intake was way to tight.  Picture below shows my 0.05 feeler gauge not being able to make it all the way through.  And since 0.05 was the smallest I had, I didn't even realize there should be a gap there (as opposed to somewhere else).

Exhaust was actually a little better.  The 0.05 slid through with drag but 0.08 would not fit.



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