Wiseco PWR131B850 Garage Buddy Complete Engine Rebuild Kit 85mm 10:1 CR

The Wiseco PWR131B850 Garage Buddy Complete Engine Rebuild Kit is a precision-engineered, all-in-one solution for a full top and bottom end engine overhaul. Designed for the Honda TRX400EX Sportrax and TRX400X, this kit delivers everything needed for a thorough engine rebuild in a single box, saving time and eliminating the hassle of sourcing individual components separately.

At the core of this kit is a Wiseco forged 4-stroke piston at the standard 85mm bore with a 10:1 compression ratio. Forged construction offers significantly greater strength and durability over cast alternatives, making it well-suited for the demands of high-performance ATV riding and racing applications.

Kit Includes:

• Wiseco stock-stroke crankshaft assembly — inspected and ready to install
• OEM-quality main bearings (#BK5047)
• Wiseco 85mm STD bore forged piston kit (#4606M08500) with 10:1 compression ratio
• Wiseco piston ring set (#3347XC)
• Wiseco piston wrist pin (#S520) and circlips (#CW20)
• Wiseco top end gasket kit (#W5514)
• Wiseco bottom end gasket kit with oil seals (#WB1171)
• Wiseco cam chain (#CC004)
• Maxima assembly lube
• Hour meter with mounting bracket and decal

Every component is manufactured to exceed OEM specifications and tolerances, ensuring reliable sealing, reduced friction, and extended service life. The included hour meter and bracket allow you to track engine runtime and schedule critical maintenance intervals with confidence.

The Wiseco Garage Buddy Complete Engine Rebuild Kit is covered under a 90-day / 10-hour limited manufacturer warranty against defects, and is proudly made in the USA.