Fellow TT'rs. Had ZipTy do the carb mod to my 06 YZ450. After having the bike completely apart, it started on the 3rd kick. Absolutely ZERO popping on deceleration now. Haven't had it to the track yet, but so far it seems to be working fine. Customer Service: The guys at ZipTy are super nice and super responsive. Had my carb back in days. On a side note: if you EVER remove the plastic fitting on the carb that connects the hot start cable, do your self a HUGE favor. Get the ZipTy aluminum hot start nut. Teh stock plastic connector is good for about one use and absolutely worthless. You will be glad you listened. Bottom Line: Impressed with this company and their service.