I recently acquired a 2003 wolverine 350. It had been sitting for a while when I got it and didn't run. The fuel smelled terrible so I assumed the carb was plugged. After draining and flushing the fuel tank, I removed the carb to clean it. I had planned on rebuilding it, but couldn't get the main jet removed. I decided to save myself some time and many headaches and buy a new carb for it. I also changed the spark plug, added a fuel filter, and put a new air filter element in. The bike now starts and idles great. It revs fine in neutral and will drive good in reverse. However, when I drive forward it sputters and stalls periodically. I have unplugged the parking brake sensor and did not notice any difference. Any one have any ideas where to go next?