We are introducing our new ISR Race Legal IMPROVED STOCK CLASS ONLY Performance Head and Carb Kit for the Yamaha Snoscoot, Arctic Cat ZR 200, Ski-Doo MXZ 200 & Polaris INDY 200. The head has been CNC ported for better air flow and machined for higher compression. Add stainless steel valves and light weight valve spring retainers along with a PZ22 Walbro Carb and Filter and you will see up to a 2.5 HP + gains and significant increase in torque over the stock engine. Kit includes head gasket and instructions. Part # GYR-E1121-10 *NOTE YOU WILL NEED TO USE THE LO206 ADJUSTABLE MAIN JET TO GO WITH THIS CARB* click here to purchase On 2020 & NEWER sleds we recommend using the stock OEM carb. *Kit can be purchased as head only and will bolt onto stock carb.* Instructions