I have a 1993 CBR600F2. Has run great until recently. Started having problems just off idle to about 3500-4000 rpm.....during acceleration it runs rough; meaning it "sputters" and seems like it is cutting out or something. The bike idles perfectly and above 4000 rpm...no problem. I cleaned out the carbs by spraying them with gum out and ran Sea Foam through the tank twice, idled even better and ran much smoother above 4000 rpm, but did nothing for the sputtering during acceleration between off idle and about 4000 rpm. If I roll on the power slowly, its even worse (much more noticable)! Has anyone else had such an experience? I am thinking possibly jets because the air filter is new as are the spark plugs. Gaps checked and rechecked by the way. Nothing seems to make a difference. How about carb synching? Could it be the wiring set? Or even faulty ignition coil(s)? If carbs are out of synch, would this cause what I am seeing? Need some help from those in the know. Thanks!!! [:-][:-][:-][:-][:-][&o][&o][&o][&o]

 

i say the jets you have 2 typs of jets there is the main jets with is whan you accelerat and you hve slow jets that are at idel i say clean out the slow jet and check the carb flots and the flotpins