hi; I'm new here. I have a 1970 bsa since 1974.i 've done a lot of work to it thru the years .it's been sitting for the last 8 years .have not had time for it. but now I want to play with it again. it was running every weekend for the last two months;now it doesn't want to kick over.have spark .it gives a little hmmph ;sounds like it's ready to go ;but won't.then I think I flood the carb.[it's all stock]...any ideas? thanks!