Hi all. I have a 1981 1100a which used to run ok but is now running rough, struggles to tick over and revs flat out when you blip the throttle. I rebuilt the carbs with new jets and float needles. The fuel level is correct on all four and they are reasonable well balanced. New carb rubber throats and air filter. Timing is correct, checked with timing light, new fuel in tank. New plugs and I've just spent a tidy sum in converting it back to original spec as it had the wrong headlight and lamp mounts. I've got to the point of viewing the sledgehammer with increasing affection and the bike is fast running out of time before I break it and sell the bits. It passed mot with no advisories last month but is now impossible to ride. If anyone has an idea of what direction to go, I'll be eternally grateful. I've been in the motor trade for 45 years and this bike is making me feel like a hopeless novice!!:???: Sarcasm and leg pulling more than welcome if attached to some help! Thank you in advance.