Description
A worn or damaged crankshaft directly compromises engine reliability and power delivery on your YZ125. This Wiseco assembly eliminates guesswork with factory-assembled, precision-trued components that meet OEM specifications out of the box. Whether you’re rebuilding after a failure or refreshing a high-mileage motor, this complete kit delivers the durability and efficiency your 2-stroke demands.
The double-forged connecting rods provide the dimensional consistency and strength needed for sustained high RPM operation, while shot-peening removes internal stresses that typically lead to premature fatigue. Advanced surface treatments and case-hardened rod bores resist corrosion and wear, extending component life in demanding conditions. Precision oiling slots and double-drilled small ends ensure your connecting rod stays adequately lubricated and cooled—critical for 2-stroke reliability.
- Fits: 2001–2004 Yamaha YZ125
- Factory-assembled, precision-trued
- Double-forged connecting rods
- Shot-peened for durability
- Case-hardened rod bores
- Corrosion-resistant surface treatment
- Precision oiling slots
- Double-drilled small ends
- Includes top end bearing
- Premium main bearings included
- Complete bottom end gasket set
- All seals included
- Meets OEM specifications
- Bolt-on installation
