a few weeks ago my 2002 honda 919 (6000 miles) developed a sputter at idle. the idle on this bike has never been entirely steady and it is my understanding that this is due to the nature of the fuel injection system. the problem started suddenly. the sputter is not very loud, but it is easily noticable. i can't entirely tell if it is a small backfire or a misfire, but sometimes it is louder than other times and sounds more like a small backfire. at first i thought that i had a little water in my gas, and that it would work through in a day or so. well, i have run about 5 tanks of gas through it since then and the problem is still the same. the sputter happens semi-regularly. it only happens between idle and 2000 rpm. any other rpm seems to run exactly the same as it always has. it doesn't happen as i roll off the throttle; it starts a couple of seconds after the throttle is completely closed. similarly it starts happening a couple of seconds after a cold start and doesn't change as the bike warms up. in trying to fix this problem i have replaced the spark plugs, checked that the breather is clean, looked for vacuum leaks without success, made sure my headers are on tight, and checked the throttle and choke adjustment. i also have been buying my gas at a different gas station than i had been. fuel injection is new to me, so i was wondering if anyone recognized these syptoms or could give me some advise on troubleshooting the problem. thanks, steve
