How to Remove your 1994 through 2001 Yamaha YZ125 Piston
The Tools You Will Need
- Safety Glasses → https://bulltru.com
- Dremel with Sanding Disc → https://amzn.to/407t6l3
- 2-Stroke Oil → https://amzn.to/3WnyXSl
- Assembly Lube → https://amzn.to/4ar8mty
- Calipers → https://amzn.to/3BRoCXX
- Brake Cleaner → https://amzn.to/4jv9v7a
- Socket Extension
- Feeler Gauge → https://amzn.to/4nrpkwx
The Parts You Will Need
- New Piston Kit → https://amzn.to/3KXHY1w (Check Your Size)
- Piston Ring → https://amzn.to/47cDyLx
- Wrist Pin Clips → 93450-16068-00
- Top End Gasket Set → https://amzn.to/4hlHG0D
Pre-Service Notes
- I recommend opening the Service & Torque Specs in a new tab for easy reference.
- If you need parts and tools, make sure to buy them here! → https://amzn.to/4h4lDKq
- Pictures with captions are below after step.
- If you need any help don’t hesitate to ask!
Yamaha YZ125 Piston Removal
- Start with the piston rotated to top dead center.
- Before removing the piston, test the condition of the connecting rod, needle bearing, and wrist pin.
- Grip the connecting rod with one hand, and try to rock, not slide, the piston side to side.
- If there is any play, you already know something is out of spec.
- Remove the pin clips with a pick
- Wear safety glasses! A pin clip to the eye hurts like you would not fricking believe.
- Remove the wrist pin.
- Remove the needle bearing, and wrap your connecting rod with a clean shop towel.
If you have any questions, please let me in the comments, or send me a DM!
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