Wiseco Crankshaft Assembly for 2005-2013 Yamaha Raptor 350 WPC137

Whether you're rebuilding a tired 350cc engine or pushing your Raptor's performance envelope, a quality crankshaft assembly is non-negotiable. The Wiseco WPC137 delivers factory-spec reliability with precision engineering that handles sustained high-RPM loads without compromise. This complete, ready-to-install package eliminates guesswork and gets you back on the track faster.

The WPC137 is factory-assembled and precision-trued to OEM specifications, meaning you're installing a component that's already been validated for dimensional accuracy and performance consistency. Double-forged connecting rods provide the dimensional stability and strength required for aggressive riding, while shot-peened surfaces reduce stress concentration points that can lead to premature failure. The precision-honed bearing surfaces and optimized oiling slots ensure oil reaches critical contact points under load, extending bearing life in high-RPM applications.

For riders serious about engine longevity and performance reliability, this is the crankshaft assembly to choose.

• Fits 2005-2013 Yamaha Raptor 350
• Complete bottom-end package included
• Factory assembled, precision trued
• Double-forged Wiseco connecting rods
• Shot-peened crank surfaces
• Case-hardened crank pin
• Caged needle roller bearings
• Premium main bearing set
• Full gasket set included
• OEM specification tolerances
• Optimized oiling slots
• High-RPM rated
• Bolt-on installation (professional service recommended)