So here is the story, I bought my 92 cbr 600 a few months ago , it has a 97 engine in it. it had the original 92 carbs installed . the bike wasn't running right with 92 carbs because of the 2mm difference in the 2 carbs and they were just generally used and abused. so i went ahead and put the 97 carbs on the bike and its running even worse. My mechanic has torn the carbs off multiple times now and messed with the jetting to no avail. today I helped him, we tore the bike down and checked the valves (which were all in the factory spec) and installed the factory(brand) jet kit. anyway.... the problem that the carbs seem to be having is that the sliders wont pull back and when they do they are jerking back and forth extremely fast. if I hold down all 4 slides and prevent them from moving the bike runs great. Im pretty lost on what the actual problem is and if anyone has any ideas or solutions they would be greatly appreciated. I posted a video of the carbs on youtube and linked it on the bottom of the post.

a few other tidbits of information which may or may no be relevant the bike has no fuel pump, no tps , i believe it still has the 92 ecm but the previous owner may have swaped it for the 97 at the time of the swap

http://www.youtube.com/watch?v=5adAhLmwInY

 

I wouldn't be so concerned with the slides. Provided that they're moving at all would indicate that they're doing what they're supposed to do. It takes high rpm and the engine under a load to get them to open for any period of time. Sitting in a garage with it in neutral doesn't simulate riding the bike too well.

Now, it should be able to rev easily without you having to hold them down. It seems clearly to be an air-fuel issue though. The biggest thing is getting the idle and low speed jets cleaned. That can be a tough thing to do since the idle jet is not removable. Also, the ports inside the throat of the carburetor are really tiny and hard to see. It's hard to tell if they're clear. I'd focus ensuring that those passageways are clean. If you've adjusted the Air/Fuel mixture screw any, put them back to the initial starting point mentioned in the manual. Put the OEM jets, (135 and 138) back in the carbs. Make sure that you have all the vacuum hoses attached. That may be a little difficult because there are differences in the F2/F3's. If you look closely, you'll see some really tiny holes near the butterfly (round brass plate), these are the ports I'm referring to.