I have a '72 norton commando 750. mostly stock with a mikuni carb. i think the ignition may be updated too. not sure. been running beautifully but just recently I've noticed some stuttering or hesitation, like a skipped beat, while cruising. doesn't seem to matter what gear I'm in. and usually at over 3500 rpm. (doesn't happen while idling. idles very smooth) if I'm just cruising, holding the throttle steady i feel a periodic sudden slight stick, jerk, hesitation, skipped beat... every so often. and sometimes i get a corresponding POP from the exhaust. I'm guessing this symptom may be pathognomonic for something fairly simple. but don't have a ton of motorcycle experience and not sure what to do. any guesses as to the problem? and its solution?
thanks for your thoughts.
thanks for your thoughts.