Pto centering

[doug tenney]

That's a tempting option (cut down 3/4" dia PTO's for use on karts).  However, the life of the clutch drum bearing surface will probably be shorter than normal, unless the new surface is case hardened.  Needle bearing manufacturers say that that shaft is supposed to have a hardness of HRC58 to 64.  Still worthwhile.

Steve, if you have access to a harness tester, it would be interesting to see what those crankpins measure.