I’m trying to get my MC21 back on the road after a good few years of it sitting in the back garden under a bike cover.

It runs fine in neutral, rev’s fully, servos work, no smoke, but when I try to ride it its barely able to do 10mph – seriously - it has nothing to give and very smokey.

Thought it was running rich but carb set up does not help at all, its still dead.

Has to be ignition related but the fact the engine rev’s fine and the servos work makes me think the PGM is ok.

Any ideas other than try a new PGM?