I have the 2006 Arctic Cat 400 FIS Auto and it's powered by Suzuki's 376cc Engine and Suzuki's Duramatic Belt Driven Clutch Tranny , the 400 500 and 700 EFI are all powered with Suzuki Engine's and Suzuki's Duramatic Belt Driven Clutch Tranny's ; i don't know much about the other belt drive Quads out there but i know the Suzuki Dramatics are tough as Suzuki's manual shift semi auto clutch Quad !.........