Honda Crf250 Full Bottom End Rebuild

QF56-263

CRANKSHAFT ASSY 04-07 CRF250R WISECO WPC143 HONDA MX

HONDA CRF250R 2004 - 2007,,,

Wiseco Crankshaft w/Bearings and Gaskets - WPC143

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 Connecting rod kits come complete with rod, crank pin, crank pin bearing, top-end bearing and thrust washers