Yamaha Motor Co., Ltd. 397-11610-12-00 Piston Ring Kit

The Yamaha 397-11610-12-00 Piston Ring Kit is a multi-ring set for Yamaha motorcycle engines, delivering compression sealing and oil control within the cylinder. Constructed from hardened steel / alloy ring material with high-temperature resistance, the kit fits piston ring grooves for reliable installation and provides both compression and oil rings. It is designed for standard or specified oversize pistons on a model-dependent Yamaha fitment, making it compatible with OEM piston ring components. Used in engine rebuilds and maintenance to restore compression efficiency, reduce blow-by, improve lubrication distribution, and extend engine service life.