Had a 3VD ten years ago and loved it, went down the TRX route...... recently bought what looks like a very low miles 1991 3VD. Standard everything.
It's got 5500 miles on it. I've got a lot of MOT history so it may be true?
It was running a bit lumpy and hesitant below 3000rpm. My old TRX was the same and that was fixed with a carb clean and new emulsion tubes etc
I've had the carbs cleaned, tank cleaned, tubes and needles checked, changed the coil, reset float height.
It's better but still has an annoying 'miss' when held at any revs and still hesitates a little.
Any ideas where to look next?.... cdi?.....