My R6 came down with this problem over the course of about a week, its not getting worse and its not getting better... I can wind it out slowly all the way to 15,500 without any noticible problem but when I hit the trottle hard it lags out - immediately slows up and starts to gain speed slowly. ?? At first I figured BAD GAS, so i ran some injector cleaner though it and a few tanks of gas from a different station but it made no difference. Then I checked the air filter and cleaned it but it wasn't all that dirty. Any thoughts on other things I can check myself before gettin it looked over?