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Super Upgraded Triple 40 Racers Edge PK80 Engine Kit for 80CC Motorized Bicycle. Fits most 26" bikes. Upgrades include; 36 Tooth Sprocket, YD Carburetor, Window Piston, G2 Reed Valve and CNC Head 4 bolts attach the engine to your bike frame and this kit comes with 8mm vs the standard 6mm. That means the mounts are twice as strong and twice as secure. Upgraded Parts including; 47 x 40 MM Z-L connecting rod, 36T or 4T chromed sprocket, 40MM intake with G-2 Reed Valve, Long angle Chromed Muffler, 202 bearing inside of engine. 40MM Large Front Mount, Chromed 4 Bolt Chain Idler with bearing and Copper Head Gasket. GRUBEE YD CNS adjustable carburetor made by YD factory for 80CC Engines. Features: Choke cable and lever on the handlebars Main jet. (Can be re-jetted) Pilot jet Throttle needle Idle RPM screw Idle air screw Internal choke circuit that delivers more fuel with the choke on, instead of restricting air