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YFM350 Crankshaft Bottom End Rebuild Kit


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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
Make Model Year
Yamaha YFM 350 R Raptor 2005 - 2012
Yamaha YFM 350 Warrior 1987 - 2004
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