I am looking to purchase some cub cylinders for my shee and looking at maybe getting the kit that uses the stock crank or possibly a 4mm stroker crank. I ride mostly dunes and fast, open fields and roads. Is their a diff. kit that will better suit my needs and how much of an improvement am I looking at with a stock crank kit and a 4mm stroker with Keihin 35mm PWK's, V-Force Reeds, Rocket Pipes. Also, what gearing should I run? Has anyone ever had RDZ Racing build their engines? Im asking because I live in there area. If I decide to purchase the Cub cylinders (either the stock or 4mm crank) is their any extra parts that Im going to have to buy like a clutch lockout or anything else?