GOOFIT 20mm Engine Sprocket Retainer Plate Sets for 50cc 70cc 90cc 110cc 125cc 150cc Horizontal Engine ATV Dirt Bike Go Kart 20mm engine sprocket retainer plate sets. The item fits for 50cc - 125cc Engine ATV Pocket Bike Dirt Bike Pit Bike Mini Bike Quad Bike,not for GY6 or vertical engine. The inside diameter: 0.8"(20mm). This engine sprocket retainer plate sets include: One engine sprocket plate; two sprocket plate fixed screws. Reminder/Note:To ensure you purchase the correct product,please read the product description carefully or image size.thanks for your attention.if you have any issues or need any help,welcome to contact with us before or after your purchase.we will do our best to help you solve it.