Wiseco Crankshaft Assembly with Bearings and Gasket for 2002-2018 Yamaha YZ85 WPC123

A crankshaft assembly is the heart of your engine's bottom end—when it fails, your bike is done. This Wiseco kit gives you a factory-assembled, precision-trued replacement that restores your YZ85 to OEM performance specs while delivering the durability your riding demands. Whether you're rebuilding after a catastrophic failure or doing a preventive overhaul, this complete package includes everything you need in one box.

The Wiseco WPC123 assembly uses double-forged connecting rods and shot-peened surfaces to reduce stress concentrations that lead to premature wear. The caged needle roller bearings handle sustained high-RPM operation without the friction penalty of solid bearings, while precision-honed oiling slots ensure your bottom end stays cool and properly lubricated under load. This is a complete solution—you get the crankshaft, main bearings, top end bearing, and a full gasket and seal set, so there's no guessing about what else you need.

• Fits: 2002–2018 Yamaha YZ85
• Double-forged connecting rods
• Shot-peened for durability
• Caged needle roller bearings
• Precision-honed oiling slots
• Factory assembled and trued
• Includes main bearings
• Includes top end bearing
• Complete gasket and seal set
• OEM specification fit
• High-RPM rated design
• Reduced friction operation