On my way home lastnight, I opened the R up (Seems to happen a lot these days), in first running on 95 octane in sport mode with outside temp of 10 degrees and just after some nice rain she sure winds those revs up quickly, in first, once again I was the weakest link and found the rev limiter <IMG NAME="icon" SRC="http://www.vortexmediagroup.com/images/banghead.gif" BORDER="0"> . Second I shifted at around 6700rpm. Quick burst in 3rd and then had to get onto the brakes. When I geared her down into second she let out one hell of bang from the exhaust. Is this normal? Occasionaly I get this bang when shifting up when I really get onto the accelarator and boost. Have I possibly damaged something? Only single bangs, and obviously only when you push her.