Put a hebo pipe on my aerox the other day and as soon as i started the bike up and rev it once and then touch the pipe at the bottom where it bolts onto it is really hot and i mean boling? this cant be right can it and the pipe gets very hot when riding aswell obviously there going to get hot but this is really hot and im only running a mallossi sport 70's. iv'e got water in my rad. Anyone got a reason for it?