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Wiseco Bottom End Kit - WPC139 - 2003-2005 Yamaha YZ450F

Regular price $507.30 USD
Regular price $626.54 USD Sale price $507.30 USD
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Wiseco Bottom End Kit WPC139 - Yamaha YZ450F 2003-2005

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For nearly eight decades, Wiseco has been a global leader in pistons, crankshafts and other components for performance and OEM applications, providing unmatched quality and expertise. Now, Wiseco offers a full line of all the components you need to restore or upgrade any 4- or 2-stroke engine.

Complete bottom end gasket sets, containing all seals necessary for assembly, are provided with all Wiseco crankshafts, along with high-grade main bearings.

Yamaha YZ450F 2003-2005 Wiseco Bottom End Kit:

  • Crankshaft kits include crankshaft, top end bearing, premium main bearings, and a complete bottom end gasket set that includes all seals and gaskets needed to do the job
  • Crankshafts are factory assembled and precision trued to OEM specifications
  • Double-forged Wiseco connecting rods maintain superior dimensional consistency through improved grain flow
  • Shot-peeing 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 to increase oil retention and reduce friction between rod and washer interface
  • Crank pin bearings are manufactured from 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
  • Wiseco complete gasket kits are made from premium materials for maximum sealing and reliability; all bearings are OEM-Quality for reliability and performance

Fitment: Yamaha YZ450F 2003-2005 / Part Number WPC139

  To see more YZ450F performance products check out Yamaha YZ450F Performance Section 

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