On my customers motor, the oil hole above the axle is only in the bore for about the last .125 of lift. .....
The hole is exposed to the crankcase most of the time.
This really doesn't seem to be a very effective way of oiling the bushing....... And maybe they don't need much oil. YES THEY DO
I feel strongly that is the problem...you wont see an engine clamshell bearing live under these compromised feed conditions and they are subject to much less 'localized' loading.
