[THEFERMANATOR]

You do NOT turn the crank in a 2 stroke engine, and you do NOT use regular wet dry sand paper on them either(only use 1000 grit or higher crocus cloth). The crank and rod surfaces are machined to a mirror finish and then hardened. In a 2 stroke the bearings do not ride on a cushion of oil, so the surfaces MUST be a much harder finish, and must have a mirror finish as well. The actual bearings are made of a soft material, but the crank and rods are have a HARD surface on them. In a 2 stroke when the surface is under factory spec, you either have th crank rebuilt(welded, turned back down to stock, and heat treated. VERY EXPENSIVE to have done right), or you replace it with either a good used one or new one. Also rememebr that since in a 2 stroke there is no cushion of oil present, the bearing tolerances must be MUCH more precise.