Weld the crank indefinatly no butts. Mine just sperated with my set up. and this is what I was running
.40 overbore, Coolhead 19cc race gas needed in low elevation, Ported,K$N,Boyseen reeds,
Trinity 2-1 35pwk, DMC 916, Namura power pistons 14/42 It was a Fn torque monster . I liked it.