Thanks Yan, the bike was mellorps r.s, he knows what hes doing, he serviced the carbs before he gave me the bike, but last time out it felt a bit rough, and was going flat when it hit top gear, does that sound like carbs?was wondering if i should get it dynod Theres a place near me called performance fabrications. Run by mark dent, theyre 2 stroke specialists, bloke does mega pipe welding fabrications,and they have a dyno.