CRANKSHAFT BOTTOM KIT 03-05 YZF450, WISECO WPC139 YAMAHA MX
Wiseco Crankshaft Bottom End Kit with Bearings and Gaskets - WPC139. Precision-trued to OEM specifications and factory assembled. Connecting rods are double-forged for superior dimensional consistency through improved grain flow. Shot-peening eliminates residual stresses and smoothly blends rod forging surfaces. Features corrosion-resistant surface treatment. Top and bottom end rod bores are case hardened to 58-62 RC to optimize bearing running surface. Crank pin bearing radial running clearance is optimized for 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 dimpled design increase oil retention and reduce friction between the rod and washer interface.
- SKU
- 56-230.WI.CBK
- Brand
- Wiseco
- Availability
- In Stock (1)
FULL DESCRIPTION
Wiseco Crankshaft Bottom End Kit
Enhance the performance and durability of your motorcycle's engine with this Wiseco Crankshaft Bottom End Kit.
This comprehensive kit includes:
- Precision-trued crankshaft
- High-quality bearings
- Durable gaskets
Key Features:
- Double-Forged Connecting Rods: Engineered for superior dimensional consistency and improved grain flow.
- Shot-Peened Finish: Eliminates residual stresses and smoothly blends forging surfaces for increased strength.
- Corrosion-Resistant Surface Treatment: Provides long-lasting protection against the elements.
- Case-Hardened Rod Bores: Optimized for bearing running surfaces, ensuring maximum performance and longevity.
- Optimized Crank Pin Bearing Clearance: Guarantees peak performance.
- Precision Honing: Ensures an ultra-round and precise bearing surface.
- Engineered Oiling Slots: Maximize rod strength and bearing life for reliable operation.
- Double-Drilled Small Ends: Provide enhanced lubrication and cooling to the piston pin, reducing thermal distortion.
- Silver-Coated Bronze Phosphor Thrust Washers: Feature a dimpled design to increase oil retention and reduce friction.
