I have a 1991 MC21 SE, and recently am getting no spark to the right cylinder. A few weeks ago it ran fine on both cylinders. I got the thing started today but it only ran on the left cylinder. I swapped coils and it still only ran on the left cylinder. I stuck a nail into the right plug cap, held on to it and had a friend kick it through. I got a good shock. I swapped plugs in the right cylinder thinking the other one was fouled and still wouldn't fire on the right. I tried the 'feel' method again with the nail in the plug cap and a friend kicking it through, this time no shock.

What could be wrong? I am considering a bottom and top rebuild but before I dump a grand into it I want to sort all the little things first. Thanks for the advice.

Skunkbait