WISECO Crankshaft Kit for Yamaha WR250F models, manufacturer part number WPC141. This kit includes a crankshaft assembly, main bearings, and a bottom-end gasket kit.
The crankshaft is factory assembled and precision trued to OEM specifications. It features a double-forged Wiseco connecting rod designed for dimensional consistency through improved grain flow, along with shot-peening to eliminate residual stresses and smoothly blend the rod forging surfaces. A corrosion-resistant surface treatment helps protect the component.
The crank pin bearing radial running clearance is optimized for performance, while precision honing provides an ultra-round bearing surface. Precision-engineered oiling slots maximize rod strength and bearing life. Double-drilled small ends provide the piston pin with additional lubrication and cooling, helping reduce top-end distortion caused by thermal transfer from the piston.
This WISECO crankshaft kit fits 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012, and 2013 Yamaha WR250F models.
Features:
- Crankshaft Assembly: Factory assembled and precision trued to OEM specifications.
- Connecting Rod: Double-forged Wiseco connecting rod with improved grain flow for dimensional consistency.
- Shot-Peened Construction: Helps eliminate residual stresses and smoothly blend rod forging surfaces.
- Bearing Surface: Precision honing ensures an ultra-round bearing surface.
- Oiling Slots: Precision-engineered slots maximize rod strength and bearing life.
- Small-End Lubrication: Double-drilled small ends provide additional piston-pin lubrication and cooling.
- Kit Contents: Includes crankshaft assembly, main bearings, and bottom-end gasket kit.
- Vehicle Fitment: Fits 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012, and 2013 Yamaha WR250F models.
Fitment:
2003 Yamaha WR250F
2004 Yamaha WR250F
2005 Yamaha WR250F
2006 Yamaha WR250F
2007 Yamaha WR250F
2008 Yamaha WR250F
2009 Yamaha WR250F
2010 Yamaha WR250F
2011 Yamaha WR250F
2012 Yamaha WR250F
2013 Yamaha WR250F