T61C 78mm Bore Cylinder Piston Ring Kit for Motorcycle Parts This piston ring kit is designed for use with motorcycle engines requiring a 78mm bore.It includes a cylinder and piston ring set compatible with T61C model applications.The components are engineered to provide sealing and performance in standard operating conditions.Suitable for engine rebuilds and maintenance where precise fitment is required. Notice: This replacement item is produced by an independent supplier.All brand and model mentions are for compatibility purposes only.