I guess it's the M21 crank that does the trick. Lots of difference between an M20 and an M21 engine and there are just standard M20 cams in that engine.

Henk.

email (option): ahum@quicknet.nl

It's why I fitted an M21 crank to those crankcases I got from you Henk. It's still going strong and I still have that new B33 piston for maybe another day. I still don't ride much over 50mph, but the extra acceleration and pulling power is just nice to have. Ron

email (option): ronpier@talk21.com