I have a BBR 88cc kit with 18mm carb and a FMF Powercore 4 big bore pipe. The jetting was done by someone with experience. So, I want to get a stock pipe so I can have a spark arrester. Will I have problems trail riding with the stock pipe? I called BBR and they said most likely I would have to re-jet the bike to run good because the stock pipe is restricting. So does anybody have experience with a stock pipe on and 88 kit. I don't mind losing power, but I don't want to stall and bog or mess my bike up, but I don't want to mess with the jetting and idle when I change pipes back and forth.