Thanks Ming...I'm on aftermarket blue transducer ignition boxes which, to get the full advance do need ignition pick up (red in my case) to be in position retarded a bit to normal timing mark. I do hover between thinking the issue is ignition one day and then carb another! I agree it seems a bit unlikely a carb would be so bad you couldn't;t start a bike and then it ran so badly it went onto one cylinder when warm. Trouble is I have had the pick up checked on another bike and no problem so next thing is to replace the blue transducer ignition boxes which I installed due to thinking the old ones were producing a weak spark/no spark/ intermittent fault. I have had spark coil re coiled, there's no wobble on the alternator flywheel as far as I can see so I don't no what the issue is.Ming wrote: ↑09 Jul 2023 05:33 FWIW I never used a strobe on the ignition on any of my Morinis, just set static timing to the mark. Likewise carbs were tuned (ahem) by ear or wires under the slides. I did change a couple of choke rubber discs. I think your carb problem might turn out to be ignition related. Even a badly set up carb should allow the engine to run badly at tick over.
...I think I may have just talked my self into buying a new ignition system from Mdina Italia!- pickup and new transducers! Thanks again to all on this thread...