I have a 93 Kawasaki Vulcan EN500 and it is not running properly. The right side cylinder doesn´t seem to be igniting like it should. I have been thru both carbs, installed new plugs, fresh gas, and an air filter. There is hesitation / both cylinders are not firing all the time. I really have to wind it up to keep the right side firing. At idle and low speeds it is very jerky. Any thoughts? I don´t know if there is something I can change in the ignition that may correct the problem. Any help would be greatly appreciated. Thank you