Wiseco Bottom End Kit - WPC131A - 2001-2004 Honda TRX400EX Sportrax

This Wiseco Bottom End Kit WPC131A for 2001-2004 Honda TRX400EX Sportrax features a crankshaft, top end bearing, premium main bearings, and a bottom end gasket set with all seals and gaskets needed for installation. The double-forged Wiseco connecting rods are precision trued to OEM specifications and shot-peened for superior dimensional consistency, while the crank pin bearing radial running clearance is optimized to ensure maximum performance. Corrosion-resistant surface treatment and precision engineering ensure reliability and performance.

Features:

• This Wiseco Bottom End Kit comes with a crankshaft, top end bearing, main bearing set, and a comprehensive gasket set with all the seals and gaskets needed for a rebuild.
• Factory-assembled crankshafts are accurately calibrated to match OEM specs.
• Wiseco connecting rods are double-forged for consistent grain structure, improving dimensional integrity.
• Shot-peening reduces stress and creates a seamless finish on the crank forgers.
• Corrosion-resistant surface treatment
• Rod bores in both the top and bottom end are case hardened to a Rockwell hardness of 58-62 RC, ensuring improved bearing performance.
• Radial running clearance of crank pin bearing optimized for peak performance.
• Precision engineered oiling slots maximize rod strength and bearing life
• Small ends with double-drilling offer the piston pin extra lubrication and cooling, minimizing top end distortion caused by 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 crafted with hot rolled steel hardened to 58-62 Rockwell.
• Caged needle roller bearings provide the highest possible rpm
• Precision machined crank webs

Fitment - 2009, 2012-2014 Honda TRX400X, 2006-2008, 2014 Honda TRX400EX

Honda TRX400EX Sportrax Performance, Motocross, Sport - Quads / ATV

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