I'm a new member and a new XT660R 2004 model owner . Cant get rid of the "surging" from the feul injection. I've adjusted the CO and tested it from 15 up to 20, it is much better , but its still there. Even when bike is idling , you can hear the revs dropping for a moment. Snorkel is removed and KN filter is fitted. The so called "surging" is really anoying on constant speeds. Need to sort this out. Otherwise a really nice bike. Any Suggestions?