Wiseco Replacement Piston Ring Set 3701XR

The Wiseco 3701XR Piston Ring Set is a high-performance 94.00mm replacement set designed specifically for use in 4-stroke engines. A critical fitment requirement is that these rings are engineered to work only with Wiseco pistons; they are not compatible with OEM or other aftermarket piston brands.

Vehicle Compatibility

This ring set is primarily used for the following makes and models:

• Honda:

  • TRX450R (ATV): 2004–2005

  • Sportrax 450: 2004–2005

• Yamaha:

  • WR400F (Offroad): 1998–2000

  • YZ400F (Offroad): 1998–1999

Technical Specifications

The 3701XR set features a specialized multi-ring design for optimal sealing and oil control:

• Bore Size: 94.00mm

• Ring Types: Includes an alloy steel, chrome-faced top ring; a phosphate-coated, taper-faced compression ring; and a 3-piece stainless steel oil ring assembly.

• Bore Compatibility: Safe for use in cast iron, Nikasil (nickel ceramic), boron composite, and Electrofusion bores.

• Warning: Do not use these rings in chrome-plated bores, as this will cause immediate engine damage.