Been doing some shopping for a cast cylinder. I see they make 105.5, 106, 108 and 110mm. Im thinking of running a 105.5 or 106 but who is known for having the best cylinder or best quality i should say? There some 105.5mm cast cylinder with piston kits on ebay for $600. just wondering if there worth a dang. I plan on doing more than just racing this engine i want to ride it too, so i need something thats going to hold up.