T Thorgtx New Member Jun 2, 2010 #1 Are 657x pistons (and top end rebuild kit) compatible with a 657 engine?
seadooya Premium Member Premium Member Jun 2, 2010 #2 pistons, rods, crank and cylinders are the same.
V voodoo New Member Jun 3, 2010 #3 Measure the little rod end - there are really 2 sizes even with the caged rollers.