Hi. My bike has been standing for 2 months. I started it and rode it. It was missing a bit then cleared. Then I started it the other day and now it's missing the whole time. You don't hear it much at idle but from about 5000 all the way to the top it sounds like it's only on three cylinders. I took the cars off and removed the jets which all seem to be clear. I did find a burnt electrical connector on a yellow wire on the right side that runs into the harness. I fixed that but the bike is still not right. Now I'm checking spark plugs and if there is spark on all 4 cylinders... Any suggestion. .. Please :)

Seems I've found a dead plug. Odd thing is the powdercoating on the head is pock marked like it has seen some electric action

Measure the battery voltage as you rev the engine from idle to more than 5000 rpm.

It climbs and holds at 14.5v

dodgy lead?

Yup. It seems in the end it was a dead plug. I've never had that happen before. Would have saved a lot of time if I'd looked at the plug before stripping the carbs