Hi all,
I’m running a 1974 Norton Commando Mk2A with the following setup:
- PW3 cam
- Open peashooter exhausts
- K&N air filter
- Pazon Sure-Fire ignition
- Genuine Mikuni VM36 carb
Current jetting is:
- Main jet: 290
- Pilot jet: 32.5
- Needle: 6DH3 (clip one notch above centre)
- Needle jet: 159 P0
- Air jet: 2
The plugs are coming up black, so clearly running rich. I’m considering moving to:
- Main jet: 240–250
- Pilot jet: 45
- Needle: 6DH4 (clip in centre position as baseline)
- Needle jet: 159 P2
- Air jet: 2
Location is roughly 120 m above sea level (≈400 ft).
Appreciate any views before I start changing things.
Thanks.
I’m running a 1974 Norton Commando Mk2A with the following setup:
- PW3 cam
- Open peashooter exhausts
- K&N air filter
- Pazon Sure-Fire ignition
- Genuine Mikuni VM36 carb
Current jetting is:
- Main jet: 290
- Pilot jet: 32.5
- Needle: 6DH3 (clip one notch above centre)
- Needle jet: 159 P0
- Air jet: 2
The plugs are coming up black, so clearly running rich. I’m considering moving to:
- Main jet: 240–250
- Pilot jet: 45
- Needle: 6DH4 (clip in centre position as baseline)
- Needle jet: 159 P2
- Air jet: 2
Location is roughly 120 m above sea level (≈400 ft).
Appreciate any views before I start changing things.
Thanks.
. So the motor is freshly rebuilt by Norman white, one of his last before retiring, its not burning any oil. Fuel consumption is i wouod estimate, on the high side.
