Voljon, could you clarify one point please: how is the 3/16" measured? If you mean with the piston 3/16" down the bore from its highest point, that will coincide with quite a long distance on the periphery of the flywheel. On the other hand if you mean 3/16" on the flywheel periphery, that will only be a couple of thousandths of an inch down the bore, for the piston.