Home 1994 – 2001 Yamaha YZ125 Piston – Inspection 3 - This measurement should be between 53.957 and 53.972 mm

3 – This measurement should be between 53.957 and 53.972 mm

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

3 – This measurement should be between 53.957 and 53.972 mm

2 – Measure your piston 10mm from the skirt and 90° to the wrist pin
4 – Take the old ring and roll it around the piston in its groove, and feel for any snags or binding