CRANKSHAFT BOTTOM KIT 04-09 CRF250R WISECO WPC159 HONDA MX

Wiseco Crankshaft Bottom End Kit

Enhance the reliability and performance of your engine with the Wiseco Crankshaft Bottom End Kit. This precision-engineered kit is manufactured to exacting standards, meeting or exceeding OEM quality for total confidence during engine rebuilds. Designed as a direct OEM replacement, it ensures easy installation.

Key Features:

• Unmatched reliability and performance from high-tech materials.
• Manufactured to exacting standards to ensure total confidence when rebuilding your engine.
• Meets or exceeds OEM quality.
• Direct OEM replacement for easy installation.
• Best value for money.
• Precision-trued to OEM specifications and factory assembled.
• Connecting rods are double-forged to 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 an 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 the top end due to thermal transfer from the piston.
• Silver-coated bronze phosphor thrust washers with a dimpled design increase oil retention and reduce friction between the rod and washer interface.
• Crank pin bearings are manufactured with the highest-quality hot-rolled steel, case hardened to 58-62 RC.