right ok .. the gilera rcr is a great bike ive have no problems with mine and keeps up with my mates rs50s and motorspanias yamahas etc will creme every rev and go easy ... mind is standard other that the restrictions beeing removed .. there is a washer around the exhaust but not in it do not open the actual exhaust as it is sealed.. also if anyone can get hold of a larger read valve or has the means of making one please would they post a reply as this would increase top end and acceleration dramatically.............