gday, just wondering if anyone has had a similar prob or can shed any light. i have a gsxr600 k4 which was running perfect. all of a sudden there was a loss of responsiveness and what felt like power. put it on the dyno and it is running rich through the mid range but still making 96 hp. no errors are coming up and the dyno graph suggests no loss of spark. everyone is puzzled. doesnt seem to be the fuel as it has been changed. any help appreciated greatly. cheers.