ProX 01.2921.A Piston Kit - Yamaha Wolverine RMAX2 / RMAX4 1000

ProX 01.2921.A Piston Kit - Standard Size A

When it is time to refresh the heart of your Yamaha Wolverine RMAX 1000, the ProX 01.2921.A Piston Kit offers a reliable, high-quality solution. Precision machined on state-of-the-art CNC equipment, this aluminum alloy piston is designed to maintain the performance and longevity of your 4-stroke engine. ProX components are engineered to provide a cost-effective alternative to OEM parts without sacrificing quality or fitment. Moto-House MX stocks the professional-grade engine components you need for your next UTV rebuild.

This "Standard Size A" kit is specifically designed for 93.00 mm bores, featuring a piston size of 92.94 mm to ensure proper clearance and optimal compression. The included piston rings are produced by world-class OEM factories to exact specifications, ensuring a perfect seal and efficient oil control. Whether you are performing routine maintenance or a top-end overhaul, this complete kit simplifies the process by providing all the essential hardware in one package.

Top Features: ProX Piston Kit

• CNC Precision: Every piston is precision machined for consistent wall thickness and balanced weight, ensuring smooth engine operation.
• OEM-Quality Rings: Manufactured by leading OEM factories to provide superior sealing and long-term durability.
• Complete Rebuild Solution: The kit includes the piston, rings, wrist pin, and circlips, along with an instruction sheet for accurate installation.
• High-Grade Material: Constructed from a high-strength aluminum alloy designed to withstand the heat and pressure of 1000cc UTV engines.
• Standard Size A Fitment: Specifically sized at 92.94 mm for standard 93.00 mm cylinders to restore factory-spec compression.

Expert Pro-Tip: Always measure your cylinder bore and check for roundness before ordering. "Size A" is intended for new or low-hour cylinders that remain within the tightest factory tolerances. Ensure you use a high-quality assembly lube on the wrist pin and rings during installation to prevent dry-start wear.

Fitment List

Year	Vehicle Brand	Vehicle Model & Size
2021	Yamaha	YXE10 Wolverine RMAX2 (Base, Limited, XT-R)
2021	Yamaha	YXF10 Wolverine RMAX4 (Base, Limited, XT-R)

Frequently Asked Questions

Q: What does "Size A" mean in a ProX piston kit?
A: ProX offers graded sizes (A, B, C) to account for slight cylinder wear. Size A is the smallest diameter, meant for standard bores that have not been honed or worn significantly.

Q: Is this piston kit an upgrade over the stock Yamaha piston?
A: ProX pistons are designed to be a high-quality OEM replacement. They offer comparable or superior durability and precision to factory parts, often at a more competitive price point.

Q: Does this kit include the top-end gaskets?
A: No, this kit includes the piston, rings, pin, and clips only. We highly recommend purchasing a separate top-end gasket kit to complete your engine rebuild correctly.

Recommended Pairings

• Top-End Gasket Set: Ensure a leak-free seal by replacing all gaskets and O-rings during your piston installation.
• Maxima Extra 4-Stroke Engine Oil: Provide your new piston with the best protection during the critical break-in period.

Restore the power and reliability of your Wolverine RMAX. Buy now at Moto-House MX!

Moto-House MX – Choice of Champions – is located in Clermont/Montverde, FL. The Best Motocross/UTV & ATV Shop in Central Florida. Stop by our local store in Montverde, FL or enjoy lightning-fast shipping across the USA.