750HP-2003
- Model 4150
- Dual 30cc accelerator pumps
- Four corner idle

- 2003 Labor
- 1 11/16” throttle bore
- Screw in air bleeds
- Calibrated for gasoline
950HP-2003
- Model 4150
- Dual 30cc accelerator pumps
- Four corner idle
- 2003 Labor
- 1 3/4” throttle bore
- Screw in air bleeds
- Calibrated for gasoline
1000HP-2003
- Model 4150
- 30cc & 50cc accelerator pumps
- Four corner idle
- 2003 Labor
- 1 3/4” throttle bore
- Screw in air bleeds
- Calibrated for gasoline