Kit comes with everything to big bore and stroke your current motor to a 662 Crank, Rod, Piston, Bearings, Seals, Gaskets, Head studs. You will also need a Raze 662 Ecu kit. If us
Baddest Motor on the block. The Thumper Racing 662 Big Bore kit makes a perfect marriage with the Raze Wingman Kit.
The Thumper Racing 662 motor paired with the Raze Ninja Backup Patented Nitrous system is untouchable by any other snowbike powerplant on the marke