Ok, I posted here last week and you guys were all a huge help, but I am really getting frustrated, because I just can't get this thing to run right and it's going to make me take it to a shop soon and I don't want to do that, so I noticed a few things this weekend while riding, hopefully they might help narrow down the list of things it might be. First a little backstory for those who don't have any clue what I'm talking about: I've got a 1993 XR600R, bone stock except for the carb which is Mikuni Flatside TM series. I'm having carb problems where it either won't idle, or if I turn up the idle enough to here it idles nicely, it wants to drive itself, like the setting is too high and the RPM won't settle down to idle soon enough so that I get engine braking. So, here's what I noticed this weekend: First, it backfires, ALOT. What does this mean? Also, I noticed that it only does the driving itself thing occasionally, and it almost feels like the throttle plate is sticking open. Like it'll get stuck at the elevated RPM, then if I tap the throttle it'll calm down. I WD'd the throttle cable and assembly and everything and it still did it. It just feels like the plate is sticking open. How can I fix that with a flatside carb when the plate is plastic and the track that it slides in is aluminum? Also, can someone please point me in the direction of a Mikuni carb manual? PLEASE? There has got to be someone here who knows where there is one online somewhere??? HELP GUYS???