I pulled out my old 1992 DR350SN after letting it sit for two years and decided I wanted it back on the road. After airing the tires and putting in fresh fuel I put the petcock on prime and put on my kicking boot. When I walked back over to the bike there was a puddle of gas underneath it. I turned off the petcock and rapped on the carb with a wooden mallet and tired it again, same thing. So I drained the carb, pulled the bottom of the carb off and cleaned the float, needle assembly and checked the o-rings and put it back together. Now when I put the petcock in prime it only leaks from the drain hose at the bottom of the carb. I pulled the bottom off again and checked if there was something stuck behind the drain plug, but that appears OK. So does anybody have an idea what is causing it to leak and what should I change out?