Bob Engelhardt wrote:



The key replaced, it still doesn't start! Arrrgh! It has spark & won't
start even with gas squirted in the cylinder.

Well, maybe it's the valve clearances - that's the only thing that's
changed, right? They're close: the exhaust should be .009 - .011 & it's
11 (12 is nogo). The intake should be .005 - .007 & it's 8+ (9 is
tight). Is the clearance that important? Or is it likely something
else entirely? Although I don't know what that could be.
No, these small differences in valve clearance will not prevent it
from running. And, you say it does have compression. Well, there's
spark, and then there's SPARK. Maybe the spark is weak, due to a bad
coil, or a bad plug. Or, the spark timing could STILL be off. Do you
have a timing light? Does this have electronic (breakerless) ignition,
or is there a set of points buried under a cover under the flywheel?

Hmmmm, funny it had the kickback when the flywheel was out of time.
That indicates the spark was adequate then. That sort of indicates
spark blowout under compression, ie. a weak spark.

Jon