i just got a suppertrap ids 2 for my 97 xr 400 . ivr instaled it im running stock jetting , the suppertrap is leaking from the clamp where the muffler meets the mid pipe anyone had this prob ?? and by the way what is the retanier pin that u have to drill a hole for ?? is it needed? thanks for any help oh yeah do i have to use the spark arst. disk if i dont will this cas any probs with the bike?