Greetings, What difference is there in the design and function of Malossi Overrange 2005 vs Malossi Overrange 2000. and is the rear pulley 128mm in dia. I have been to the Rooste (Pipe builder) site and he has a mod. that he uses,with a 128mm rear torque driver. My set-up is metra-kit sp-2 tuned, koso intake with carbon fiber reeds, tuned carters, metrakit 107mm bell and clutch, Tillotson 334 B carb (24mm) and crappy technegas rs pipe and 17/40 gear kit on yam. jog.