Description
The Wiseco B1013 top end bearing is engineered to handle the demands of high-RPM two-stroke performance, delivering reliability when your KTM 125 SX is pushed to its limits. Precision-manufactured with a case-hardened, high-silicon aluminum construction, this bearing maintains smooth operation under sustained engine speeds while resisting wear. Whether you’re competing in motocross or hitting the track hard on weekends, a quality top end bearing is essential to prevent catastrophic engine failure and maintain consistent performance.
- Fits: KTM 125 SX (1998-2021)
- Bearing size: 15x19x20mm
- Material: High-silicon aluminum alloy
- Case-hardened construction
- Precision-manufactured tolerances
- Lightweight design
- Suitable: Racing and recreational use
- Bolt-on replacement
