DevonNorton
VIP MEMBER
- Joined
- May 7, 2015
- Messages
- 216

Hi All
Is it feasible to replace the pressed-in pilot jet on an Amal Mk1 Concentric carb?
On examining the pilot jets for blockages on my 1972 750 Commando I found that the jets had been opened such that a 1.5mm drill bit will pass readily through them!
I think this is the likely cause of uneven running.
The carbs are otherwise in fairly good nick with slide, floats, valves, needle and other jets in good condition.
Ideally I'd like to repair them rather than replace.
Are there any instructions available on the best way to remove the old pilot jet and replace with a new one?
I tried searching this and other forums but could not find advice on replacing the jets. I'm ok with drilling and threading for a cut-down air screw as has been suggested but I'm not confident on how to remove the existing jet and replace.
Any advice on this would be much appreciated.
Andy
Is it feasible to replace the pressed-in pilot jet on an Amal Mk1 Concentric carb?
On examining the pilot jets for blockages on my 1972 750 Commando I found that the jets had been opened such that a 1.5mm drill bit will pass readily through them!
I think this is the likely cause of uneven running.
The carbs are otherwise in fairly good nick with slide, floats, valves, needle and other jets in good condition.
Ideally I'd like to repair them rather than replace.
Are there any instructions available on the best way to remove the old pilot jet and replace with a new one?
I tried searching this and other forums but could not find advice on replacing the jets. I'm ok with drilling and threading for a cut-down air screw as has been suggested but I'm not confident on how to remove the existing jet and replace.
Any advice on this would be much appreciated.
Andy