Yamaha YFM350, Warrior 87-04 ,Wiseco Crankshaft Bottom End Rebuild Kit – WPC137
Fits;YAMAHA YFM350R Raptor (2005 – 2012)
YAMAHA YFM350 Warrior (1987 – 2004)
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.
- FlowShot-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
