Home 1994 – 2001 Yamaha YZ125 Piston – Inspection 4 - Take the old ring and roll it around the piston in its groove, and feel for any snags or binding

4 – Take the old ring and roll it around the piston in its groove, and feel for any snags or binding

1994 - 2001 Yamaha YZ125 - Top End - Piston Inspection - Thumb

4 – Take the old ring and roll it around the piston in its groove, and feel for any snags or binding

3 – This measurement should be between 53.957 and 53.972 mm

5 – Press the ring into the groove, and then measure the ring-to-groove clearance with a feeler gauge