18-08-19, 09:17 PM
(This post was last modified: 18-08-19, 11:17 PM by His Dudeness.)
Is it running on three cylinders? If you're not sure you could do the water on the headers trick to find out. Start it, let it warm up, throw some water on the headers and see if one of them dries a lot slower than the others. If one dries slower, that cylinder isn't running properly. Then you have to determine if it's a spark or fuel problem on that cylinder. Take the plug out and check for spark. If you've got good spark it's probably a problem in the carb. If it's been parked up on the side stand in the rain there's a good chance the problem is on cylinder 3. Rain water collects around the spark plug on cylinder 3 and causes problems. Another thing. Start it when it's dark and look for arcing around the plug caps. You'll see small blue arcs between the plug caps and the head