Wiseco Crankshaft Kit - WPC134 Yamaha YZ 250 2003-2025 Brand_Maier Allows the use of exhaust

Allows the use of exhaust systems with 18 mm O2 sensor bungs to be used with late model bikes with 12 mm O2 sensors

For S&S Super E or Super G carburetors

the receiver is 1-1/4"

Increased lean angle over stock brake arm

Wiseco Crankshaft Kit - WPC134 Yamaha YZ 250 2003-2025 Brand_Maier Allows the use of exhaustFeatures 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 Crank pin bearing radial running clearance is optimized to ensure maximum performance Precision honing ensures ultra round bearing surface