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CRANKSHAFT ASSY 99-00 YZ250 WISECO WPC126

Availability: In stock

SKU: TL1262859

Part number: 56-180.WI

£493.70

Qty:

Part No. 56-180.WI YAMAHA YZ250 1999-2000,,, Wiseco Crankshaft assembly with Bearings and Gasket set - WPC126,,, Precision-trued to OEM specifications and factory assembled Connecting rods are double-forged to maintain superior dimensional consistency through improved grain flow Shot-peening eliminates residual stresses and smoothly blends the rod forging surfaces Corrosion-resistant surface treatment Top and bottom end rod bores case hardened to 58-62 RC to optimize bearing running surface Crank pin bearing radial running clearance is optimized to ensure maximum performance Precision honing ensures ultra-round bearing surface Precision-engineered oiling slots maximize rod strength and bearing life Double-drilled small ends provide the piston pin with extra lubrication and cooling, reducing distortion of top end due to thermal transfer from the piston Silver-coated bronze phosphor thrust washers with dimpled design increase oil retention and reduce friction between rod and washer interface Crank pin bearings are manufactured with the highest-quality hot-rolled steel -- case hardened to 58-62 RC Caged needle roller bearings provide the highest possible RPM Precision-machined crank webs Crankshaft comes with top-end bearing, premium main bearings and a complete bottom end gasket set that includes all seals and gaskets needed to do the job.