2 Stroke Engine Motor 49CC Racing Complete Engine Motor Pull Start Motorized Bike Engine Kit for Pocket Bike Mini Dirt Bike ATV Scooter Product function description: Feature : ▶49cc mini motor air cooled racing engine capable of achieving 40mph dependant on user weight and terrain. ▶Engine is COMPELTE WITH High performance cylinder head, plug, powder coated metal pull start, air filter and 14mm carburettor,Balanced crank, balanced flywheel, ported piston windows, uprated CVT transmission unit. ▶For 49CC 2 Stroke Pocket Bike, Mini Dirt Bike, ATV or Scooter. Fits (For the reference) Engine suitable for: For 49CC 2 Stroke Pocket Bike, Mini Dirt Bike, ATV or Scooter. Specification: Cylinder Numbers: Single cylinder Stroke: 2-stroke Gas-oil Mix Rate: 25:1 Bore: 44mm Gear Box Redu.