It's just topend.. a few in a row..
I think I got some crap in the oil tank that did not get cleaned out.
This motor looked perfect, upon start up was EXTREMELY QUIET, but within 1000 miles .. valve noise.. .
Didn't get 10 K out of it.. .. will say this ....the effort to put a long shaft motor in an early frame, is not really hard, but quite a bit of work... worth it..I don't know