Yamaha YZ250F 2003 - 2011 Wiseco Crankshaft Bottom End Rebuild Kit

Wiseco Complete Crank Kit

Each kit contains everything you need to complete your rebuild the right way, the first time - crankshaft and connecting rod, all applicable bearings, and complete bottom end gasket kit made to meet or exceed O.E.M. quality.

• Wiseco connecting rods are double forged from a dedicated forging and feature shot peening, oil slots, and coated bronze thrust washers.
• Bottom end gasket kits are made from premium materials, exceeding O.E.M. standards, to provide exceptional seal between critical mating surfaces.
• Main bearings are manufactured to the highest quality standards; each is case hardened for maximum life and smooth operation at high RPM's.
• Corrosion-resistant surface treatment to prevent corrosion and pitting over long term use or storage; this will add to the life as well the strength of the assembly.
• Top end of rod is bushed for oil retention and eliminates pin galling; the bottom end rod bores are case hardened to 58-62 RC to optimize bearing running surface.
• The crank pin bearings are manufactured from the highest quality, hot rolled steel case hardened to 58-62 RC to extend the lifetime of the assembly.
• Caged needle roller bearings to provide the highest possible RPM.

Fitment Details

• Yamaha YZ250F 2003
• Yamaha YZ250F 2004
• Yamaha YZ250F 2005
• Yamaha YZ250F 2006
• Yamaha YZ250F 2007
• Yamaha YZ250F 2008
• Yamaha YZ250F 2009
• Yamaha YZ250F 2010
• Yamaha YZ250F 2011