even if you were to get it to fire, you would want to remove, clean and rebuild, rejet the carbs. after sitting 4 years, the bike and motor should have a thorough shake down and cleaning of all parts and connections. Doing a job right takes some time and can be good wrench therapy. Doing a job fast for expediency sake is not worth doing it at all. short cuts always come back to bite you in the end. poncho