Wiseco Yamaha YZ 250 2003-2020 Crankshaft with Bearing and Gasket

Features:

• 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

Specifications:

• Product Name: Crankshaft Assembly
• Type: Bottom End
• Material: Steel
• Stroke Length: 72.00 mm
• Features: Includes Bearing and Gasket
• Units: Kit
• Riding Style: Off-Road

Fitment: