Every once in a while while I am downshifting to come to a stop the bike will just die. This doesnt happen very often but it has repeated this a few times now. The bike starts right back up but this shouldnt happen. I have a full exhaust and a power commander with stock filter. What would cause this to happen? Is this the yamahastall that I have heard about? I do have the second gear problem where the bike accelerates slow from 5,500 rpms. I just havent made the Dealer fix it yet.