The VERTEX Piston Kit is a forged OE replacement designed for specified Yamaha WR400F and YZ400F applications. This 91.93 mm piston kit is listed for the 1998 and 1999 Yamaha YZ400F, as well as the 1998, 1999, and 2000 Yamaha WR400F. The manufacturer part number is 22567A.
The piston is heat-treated using a T-5 hardening and tempering cycle. Its skirt features a Molybdenum Disulphite coating intended to support faster break-in time and increased piston life. The replica piston and all rings are OEM replacements.
The kit includes the piston, rings, wrist pin, and circlips. Distributor part number: 22567A. Vehicle fitment includes the 1998 Yamaha YZ400F, 1999 Yamaha YZ400F, 1998 Yamaha WR400F, 1999 Yamaha WR400F, and 2000 Yamaha WR400F.
Features:
- Forged OE replacement piston
- 91.93 mm piston size
- Heat-treated with a T-5 hardening and tempering cycle
- Molybdenum Disulphite-coated piston skirt for faster break-in time and increased piston life
- Piston and all rings are OEM replacements
- Kit includes piston, rings, wrist pin, and circlips
- Fits 1998 and 1999 Yamaha YZ400F models
- Fits 1998, 1999, and 2000 Yamaha WR400F models
- Manufacturer part number: 22567A
Fitment:
1998 Yamaha WR400F
1998 Yamaha YZ400F
1999 Yamaha WR400F
1999 Yamaha YZ400F
2000 Yamaha WR400F