As title says it is running on two outside pots, inside pair run on same coil so I have a new one on the way, but I am curious would a faulty ignitor be the cause as I am unsure if it would run on two. Any info would be appreciated

Hi Alan, it will run on two cylinders tho it wont be happy about it, just a quick question I have the XJ750 and that has 1 3 4 2 firing order so the cylinders are split between the coils and as the coils can't fail on one half of the firing order I was wondering if you had it right, I have just rebuilt a Suzuki and that had the same fault as your describing and it was the plug caps that were screwed not the coils, just my thoughts on it you understand as your stood by the bike and I'm not but I would suggest that you check the spark plug caps just to make sure.

Many thanks never touched leads coils since owned always ran perfect until now, by the way new coil has just arrived about to fit so will soon see what happens

well it seems ok going for a short test ride, once again thanks for info

Good news mate glad you got it sorted.

Ermm not quite, it ran perfect then it went on two again, stripped carbs down and found 2 pilot jets were nearly falling out, wondering wether to locktite them into position 2 turns out

I think were talking Airscrews here [ 2 turns out] AS pilot JETS are screwed fully home , and are inside carbs,,

Yes sorry I got that wrong now sorted and runs fine