clutch kit that meets your driveline needs eliminates the time and effort required to find the right model Include: 1*clutch Assembly 1*Variator Assembly 1* 743 belt, You only need to confirm the corresponding engine or model. These three parts are applicable in sets. High quality clutch:19 Splines Inside The Clutch Drum/Bell OD of Drum: 136mm??ID of Drum: 125mm ID of spline area: 14.4mm??Fits GY6 125cc and 150cc 4-Stroke Engine The Belt is made of high heat-resistant and high-strength materials, Premium belt provides longer durability for applications. Variator Assembly for gy6 150cc?? Variator Size:Diameter 108mm ; Variator Pin Length:52mm; Variator Pin OD 24mm ID 15mm??Fit GY6 125cc&150cc 152QMI 157QMJ Engine Roller Size??18*14mm GY6 50CC cluntch set with 669 high performance belt GY6 50CC cluntch set with 669 belt GY6 150CC clutch set with 743 high performance belt