Wiseco Piston 01-04 YZ125 Crankshaft Kit

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

Only one part number to stock and order

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