RMZ250 Kits Stage 1 Includes: Carb mod rejetted bog free and easier starting (does not include rebuild parts) TLR Valve springs Recondition head(clean, inspect and recut valve seats) Head gasket and valve guide seals OEM valves Stage 2(pump gas) Includes 1 plus: Porting NGK Race Plug (for quicker starting and better throttle response) Stage 3(race gas only) Includes 1-2 plus: TLR valves TLR race piston kit Hone and lap cylinder (cleaned and prepped) Base gasket Stage 4(race gas only) Includes 1-2-3 plus: TLR billit cam Tumble all gears and shafts TLR Mod crank Install seats and guides Hinson clutch components Boyesen water pump kit Replated cylinder Ti retainers All gaskets Cam chain NOTE: To maintain proper performance the most over looked part is the cam chain. When ever you do a top end it would be wise to change the cam chain.