Hey guys, Im new to the forum and have been looking around and liking what I see here. I was wondering if anyone had any suggestions to my problem and/or ideas on what i can do to fix it!! Here it is: I own a used lifan 138cc pitbike that i had bought last year from a friend who left it outside over the winter. About a month ago the bike was starting first kick every try but was bogging, spitting/jetting when in idle as well as being rev'd.. I let it run for a bit when the thing just backfired real loud and shut off. Now it wont start and I'm thinking it could be the carb. (gnna clean it as soon as I get a chance.. heavy work schedule).. changed spark plug and still wont start... any thoughts? any info would really help!!! Thanks alot in advance guys!