having just bought a hanger 9 twist 40 I was thinking of the Jen56 wt 1 lb 3.8 oz mvvs 40 wt 1lb 0,4 oz I have decided to go with the
mvvs 40 about 3 oz lighter (both with dieselheads the jen 56 AJs the mvvs davis head. so on to the bench with the mvvs
13x5 wood zinger 8200 13x6 wood zinger 8100 11x7 gray graupner 9500 idle on all quite good 2000 average. then disaster then engine
booged and squeeked to a halt IT did it again the wrist pin c clip came off (this may have been my error in installation l just e mailed
paul at JE to send a new liner piston and rod (having him install the c clips) the groove for the c- clip does look a little more shallow
then the one on the other side which may have been the problem they were installed so the c was vertical and it was humming so good
martin
There is good news Turkey and ham only a hr from now

Slightly used piston and liner mvvs available with the latest cooling grooves on both