Crankshaft kit Wiseco Honda CRF250R 04-07

Crankshaft kit, includes:

- crankshaft, top-motor bearing, premium crankshaft bearings and a complete lower seal set, including all seals needed to complete the job
- Factory-assembled and precision-balanced to original specifications
- Double-forged Wiseco connecting rod maintains superior dimensional consistency
- Reduced residual stresses allow for blending of connecting rod forging surfaces
- Anti-corrosion surface treatment
- 58-62 RC case-hardened upper and lower connecting rod bores to optimize bearing surface
- Piston pin needle cage radial bearing clearance optimized for maximum performance
- Precision de-icing to ensure a very round running surface
- Precision-engineered lubricated openings improve connecting rod strength and bearing life
- Double-bored ends provide the piston pin with additional lubrication and cooling, reducing distortion of the top drive due to heat transfer from the piston
- Silver-coated phosphor bronze washers with indentations improve oil retention and reduce connecting rod friction
- Crankpin bearings made from hot-rolled steel - Needle bearings offer the best possible engine speed
- Precision-machined centrifugal weights