RUNFAST TM 2-STROKE 2-STROKE MOTORIZED BIKE YD-100 ENGINE ONLY

A MEGAPOWERED RUNFAST TM 2-STROKE 2-STROKE MOTORIZED BIKE YD-100 ENGINE ONLY for UPGRADING  your bike ENGINE  INTO A SUPER MOTORIZED BIKE!   BALANCED CRANK FOR SMOOTH RIDES UNBEATABLE FUEL MILEAGE OF 100 MPG  SPEEDS OF 35+ PLUS MILES PER HOUR (KEEP IT UNDER 15 MPH FOR SAFETY!) EASY PEDAL, POP THE CLUTCH, TURN THE THROTTLE, AND GO ACTION PEDDLE/MOTORIZE ANYTIME YOU WANT Engine Type: Single cylinder, air-cooled,2-stroke Mixing Ratio of Fuel(90#) and Engine Oil: 16: 1 for New sets, 20: 1 after Running 500 km Power: 1.8KW mini Bore and Stroke: 50mm x 40mm Cylinder inner diameter 50mm Piston outside diameter 50mm Maximum speed:45-50km/h 8mm front and rear mount studs   Cylinder head and Cylinder Two in one, better design for cooling, higher power with hill driving easily WHAT YOU RECEIVE: 1 RUNFAST YD-100 MOTORIZED BIKE ENGINE   1 Spark plug Note:  this is the upgraded engine.  Other motorized bike parts not included and sold separately.   WHY RUNFAST IS THE HIGHEST QUALITY MOTORIZED