Wiseco Honda TRX 400 EX crankshaft with gasket and bearing set - WWPC131A

General description

• complete with crankshaft, top bearing, main bearings, and complete bottom seal kit, including all seals needed to get the job done
• only one part number to store and order
• crankshafts are factory assembled and precisely adjusted to OEM specifications.
• Wiseco's double-forged connecting rods maintain excellent dimensional consistency due to improved grain flow.
• Shot-blasting eliminates residual stresses and smooths bar forging surfaces.
• corrosion-resistant surface treatment
• upper and lower rod bore hardened to 58-62 RC to optimize bearing working surface
• radial working clearance of crank pin bearing is optimized for maximum performance
• precision honing provides an ultra-round bearing surface
• precision-engineered oil slots maximize rod strength and bearing life
• double-drilled small ends provide the piston pin with additional lubrication and cooling, reducing upper piston distortion caused by heat transfer from the piston
• Silver-coated bronze phosphor thrust washers with recesses to increase oil retention and reduce friction between piston rod and washer
• Crank pin bearings are manufactured from the highest quality hot-rolled steel; hardened to 58-62 RC
• needle roller bearings with cages provide the highest possible rpm
• precision-machined crank arms