Home 1994 – 2001 Yamaha YZ125 Piston – Inspection 5 - Press the ring into the groove, and then measure the ring-to-groove clearance with a feeler gauge

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

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

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

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

6 – The connecting rod to crankshaft clearance should be no more than 0.026 inches.