CRANKSHAFT ASSY 01-04 YZ125, WISECO WPC125 YAMAHA MX

Wiseco Crankshaft Assembly for Yamaha YZ125

This Wiseco Crankshaft Assembly is engineered for high-performance off-road motorcycles, specifically designed to meet or exceed OEM specifications. It is factory assembled and precision-trued to ensure optimal engine function and longevity.

Key Features:

• Double-Forged Connecting Rods: The connecting rods are double-forged for superior dimensional consistency and improved grain flow, enhancing strength and durability.
• Shot-Peened Finish: This process eliminates residual stresses and smooths the rod forging surfaces, contributing to overall toughness.
• Corrosion-Resistant Surface Treatment: Protects components from environmental damage and wear.
• Case-Hardened Bores: The top and bottom end rod bores are case hardened to 58-62 RC, creating an optimized running surface for bearings.
• Optimized Bearing Clearance: The crank pin bearing radial running clearance is precisely set for maximum performance.
• Precision Honing: Ensures an ultra-round bearing surface for smooth operation and reduced friction.
• Engineered Oiling Slots: These slots are precision-engineered to maximize rod strength and extend bearing life by ensuring adequate lubrication.
• Double-Drilled Small Ends: Provide extra lubrication and cooling to the piston pin, reducing distortion caused by heat transfer from the piston.
• Silver-Coated Thrust Washers: Features thrust washers made of bronze phosphor with a dimpled design. These increase oil retention and reduce friction between the rod and washer interface.
• High-Quality Crank Pin Bearings: Manufactured with the highest-quality hot-rolled steel and case hardened to 58-62 RC for exceptional durability and performance.
• Includes: This assembly comes complete with necessary bearings and gaskets for a complete installation.