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Yamaha YZ250 Wiseco Crankshaft Bottom End Rebuild Kit – WPC126
Fits;
Yamaha YZ250 (1999 – 2000)
Bottom End Rebuild Kit includes;
crankshaft assembly, complete bottom end gasket kit, and bearings
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
| Make | Model | Year |
|---|---|---|
| Yamaha | YZ 250 | 1999 - 2000 |
