Complete Rear Clutch For GY6 125cc 150cc 4-Stroke Engines 19 Splines Inside The Clutch Drum/Bell Outer Diameter of drum: 136mm??Inner Diameter of drum: 125mm Inner Diameter of spline area: 14.5mm??Pulley Diameter: 141mm Check Pictures And Measurements Before You Purchase Necaces parts is a brand that focuses on dirt, bike, ATV, go, kart and other motorcycle powersports accessories.Our accessories include commonly used replacement parts and personalized modifications.We will update our products all the time, and the parts you need will appear in our shop.If you have any questions about the product, please leave a question or let us know by email, we will answer for you.If you have more needs, please let us know by email. We are happy to serve you.Believe me, when you placed your order for the first time, the long story between us is just beginning.