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Wiseco Bottom End Kit - WPC134 - Yamaha YZ250 / YZ250X 03-20 2-Stroke

Regular price $393.13 USD
Regular price $436.80 USD Sale price $393.13 USD
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Wiseco Bottom End Kit - WPC134 - Yamaha YZ250 / YZ250X 2003-2020 2-Stroke

Moto-House MX offers free shipping on the Wiseco Bottom End Kit - WPC134 for Yamaha YZ250 / YZ250X 2003-2020. Wiseco is a renowned name in the industry, known for their high-performance and quality motorcycle pistons and crankshafts. For 78 years, they have been a global leader in OEM replacement and performance pistons for various motorsports. Trust Wiseco's expertise and experience to bring your 4-stroke or 2-stroke back to life.

Yamaha- 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-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 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


  • Yamaha YZ250 / YZ250X  Part Number WPC134

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