Two separate questions first, Any experience with cylinder works kits on here? I havent seen anything about them on here. I have seen them as cheap as 394 on ebay. That seems pretty low. Seems hard to pass up on as I am planning on putting a piston in which means it'd need a gasket set anyway so now were up to almost 200 just for a fresh piston. Any opinions? Next the gytr head that just came out is that quad only? If not what years does it fit and any way to make it fit the older bikes? Thanks alot, Matt.