yeah bill,, i find it odd that its a baffle to blame for my probs, do ya remember i said the prob started, as i went over a bump, which could cause it to loosen. if its a valve, its not going to repair itself, so,, the prob would still be there,, [ wouldent it ? ]the gn is back to full top end power again, since ive put the new pipe on.i thought i would solve the prob by process of elimination, so like you ime,, baffled,, mal