I have a 2008 Nision Street Premium. First year no problems. Now this whole year I have had random stalls to stalls I know is going to happen like 50 yards from my house. Rather I warm the bike up or just start and go. I have added a second air filter intake from loydz along with a idle air valve from loydz. All recalls are fixed. I put in new spark plugs and HP air filter. I changed out stage 1 level 2 for a very loud and sweey exhaust from the WITCH DOCTOR. Still have the same damn problem. Took the bike to a local dealer, he didn't have time for me. No bike is out of warranity, so now what to do.