Home 1994 – 2001 Yamaha YZ125 Piston – Inspection 2 - Measure your piston 10mm from the skirt and 90° to the wrist pin

2 – Measure your piston 10mm from the skirt and 90° to the wrist pin

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

2 – Measure your piston 10mm from the skirt and 90° to the wrist pin

1 – This piston exhibits perfect carbon buildup, indicating that the pre-mix ratio is correct, the carburetor is tuned correctly, and the transfer ports are flowing freely.

3 – This measurement should be between 53.957 and 53.972 mm