Premium replacement crankshaft assembly designed to meet OEM specifications, delivering durability, reliability and consistent performance for high-demand two-stroke applications.

Features

• Precision trued to OEM specifications for fit and operation
• Double-forged connecting rods for dimensional consistency and improved grain flow
• Shot-peened surfaces to eliminate residual stresses and blend forging transitions
• Corrosion-resistant surface treatment
• Case-hardened rod bores (58–62 RC) for optimal bearing running surfaces
• Optimised bearing clearance for performance and longevity
• Precision-honed bearing surfaces for ultra-round geometry
• Oiling slots to enhance rod strength and maximise bearing life
• Double-drilled small ends to improve piston pin lubrication and cooling
• Silver-coated thrust washers with dimpled faces for oil retention and reduced friction
• High-quality crank pin bearings made from hot-rolled steel and case-hardened to 58–62 RC

Specifications

• Assembly type: Factory-assembled crankshaft with connecting rod
• Intended use: High-demand two-stroke applications

Cross-Reference OEM Part Numbers

• 56-177_WI.CBK

Vehicle Fitments

• Yamaha YZ80 1993–2001