I have a 2005 Honda CRF450X with a White Brothers Racing E2 aftermarket exhaust. I want to repack the exhaust and when I attempted to remove the 5mm Allen screws I noticed that they were striped. (the part where the Allen tool goes into the head) So what are my options here to try and get the 5 mm screws removed? The exhaust is still in excellent condition and I would hate to have to spend more $$ on a new pipe. Any help would be appreciated. Thanks Dan.