KIT INCLUDES:Malossi 90cc Cylinder Kit #3116919 (2 Hole Exhaust Flange Style)Pro Race Crank 42.3mm/90mm Rod #5316912Head Plug #278359B5mm Cylinder Spacer #0716344Wrist Pin Bearing #6611785NGK B8ES Spark PlugTECH:Engine Type Minarelli HorizontalDisplacement 90ccPiston Pin 13mmStroke 42.3mmPiston Bore 52mm