Wiseco PWR131B860 Garage Buddy Complete Engine Rebuild Kit 86mm 10:1 CR

The Wiseco PWR131B-860 Garage Buddy Complete Engine Rebuild Kit is a comprehensive top and bottom end rebuild solution engineered for the Honda TRX400EX Sportrax and TRX400X. Featuring an 86mm bore (+1.00mm oversize) and 10:1 compression ratio, this kit delivers everything needed for a full engine overhaul in a single box — from the crankshaft assembly to the piston kit and beyond.

Wiseco's Garage Buddy kits are built around a forged 4-stroke piston, which offers superior strength and durability compared to cast alternatives. Each component is manufactured from premium materials and engineered to exceed OEM specifications and tolerances, ensuring reliable performance under demanding riding conditions.

Kit Includes:

• Wiseco forged 4-stroke piston kit with piston rings (86mm bore, +1.00mm oversize)
• Crankshaft and rod assembly — designed and inspected for durability
• OEM-quality main bearings
• Complete gasket, seal, and o-ring set (top and bottom end)
• Cam chain (included for 4-stroke applications)
• Wiseco hour meter and bracket for tracking engine runtime and service intervals

Specifications:

• Bore: 86.00mm
• Size Over Standard: +1.00mm
• Compression Ratio: 10:1
• Engine Type: 4-Stroke
• Made in the USA

Wiseco backs every component with in-house dyno testing and rigorous R&D, making the PWR131B-860 a trusted choice for riders seeking a complete, no-compromise engine rebuild solution.