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Wiseco Bottom End Kit - WPC124 - 1998-2000 Yamaha YZ125

Regular price $322.37 USD
Regular price $387.01 USD Sale price $322.37 USD
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Wiseco Bottom End Kit - WPC124 - 1998-2000 Yamaha YZ125. Ships Free!!

Clyde Wiseman founded Wiseco, now a leading provider of OEM replacement and performance pistons, in 1940. Through 78 years of experience, Wiseco is renowned for its performance and quality, providing reliable parts for motorsports applications. Wiseco is your go-to source for restoring 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 YZ125 1998-2000 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 YZ125 1998-2000 Wiseco Bottom End Kit / Part Number WPC124

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