hello all i'm new to this site. I've got a question, I've got a poppin or a backfire comming out of the carb. I took it to a local shop and had the carb rejetted and tuned but the problem is still there. It happens when i get out of the throttle and then back on again. Is the tune not right or something else wrong. I also run 92 octane gas

 

I guess this info would be imporant its a 01 1200 XL with a screamin eagle package.

 

Take it back!

 

make sure the vacuum lines are not dry rotted this was a problem on my 03 1200C....changed them and is noticeably better...still pops oncein a while....

 

thanks I just went out and looked at the vacuum hoses and they do look weathered and will be the first thing that i replace before taking the bike back to the shop