The Yamaha YZ125 is a high-revving, precision-dependent 2-stroke engine where correct cylinder geometry and clearances are critical for performance and reliability.
This service is designed specifically for YZ125 cylinders that require a cast iron sleeve due to scoring, previous over-boring, or structural wear.
Our process restores proper bore geometry, sealing surface quality, and serviceability for future rebores.
Each cylinder is inspected, machined, sleeved, and finished using professional equipment to ensure consistent results and long-term durability.
YOUTUBE Video how we sleeve a Nikasil cylinder.https://www.youtube.com/watch?v=Ma68gdH2QQY&t=190s
Why Choose Us for Your YZ125 Cylinder Repair?
Extensive experience with Yamaha YZ125 2-stroke cylinders
Model-specific sleeve selection
Precision honing on a Sunnen honing machine for accurate clearances
Deck machining for optimal gasket sealing
Clear communication and approval before any additional work