Previous owner of sled owns a Yamaha dealership up here in Maine and his mechanic set it up.I assume he knows what he's doing.its a lower gear I think he said,its a bender clutch kit,but don't know the specifics,exactly. He set it up for the quick run 0-100 very very quick,but takes more for that extra 8 mph or so.I know that some sleds I have lined up with are very surprised,I beat a zr800 with no problems and a dragon switchback 800 efi and that was too easy.I realize there not the fastest sleds but this one was set up pretty good.only thing is I can't can any one complete specifics but then machanic that set it up has since retired and moved away.