ok- thanks again to everyone for their help pertaining to everything else i have been asking about and now i am really stumped.
here's everything i have done.
1. flushed the tank....gas runs free into the carb.
2. took the carb apart and cleaned it replaced it.
3. replaced the spark plug and there is a spark.
4. the brake light works...sometimes?!?! like it will come on then die...then come on......would this be the problem.
5. i tried taking off the muffler for a start like someone suggested (jim) and still no go.
the only thing that i can think would be the timing?????
please help! i am dying here!