Hello. I got a new carb and put it on. The bike ran great, sounded great. So I parked it in the garage and left it for a few days. Well today I go to start it and I get a Huge backfire out of the muffler pipes. I mean huge. I couldnt even hear. Now when I try to start it it just keeps on backfiring and wont start. Every once in awhile it will start run for a minute which seems fine. Sounds fine then it stalls and when I try to start it, it just backfires. I dont know what is wrong. Ca anyone help me? The bike is a 1983 xlh 1000. Thanks alot. If I take off the breather and crank it I can see some gas coming out of the carb. Is this normal?