- The piston is heat-treated with aT-5 hardening and tempering cycle
- The piston skirt is treated with a Molybdenum Disulphite coating for a faster break-in time and increased piston life
- Forged replica piston is a forged OE replacement
- Replica piston and all rings are OEM replacement
- Piston kit includes piston, ring, wrist pin and circlips
| Compatible Vehicles | |||
| Years | Make | Make | Notes |
| 1998-2000 | Yamaha | WR400F | |
| 1998-1999 | Yamaha | YZ400F | |