Diagnosing Engine Whirr

Thanks! The stock gears might be a bit different (I got one coming), but that dimension and 11/64" chain movement at the cam gear at the service limit works out to about 3.1 degrees cam slop and so a bit over 6 degrees of crank movement for the service limit. Good to know, IMO.

Id like to know/have an easy to understand definitive test to say either way that the slop is just too much if you come up with something.

I have a couple of spare engines I am playing with and I would like to test them.