I live in Israel and ride a Yamaha 1997 XTZ660 3yf as my daily driver.
My bike is not idling well. It started out with what was diagnosed as the carburetor sucking air through the throttle shaft (part number 5Y1-14572-00) this resulted in the engine climbing to high RPS and not going back down to idle speeds once the bike was warmed up. The part (plate stay, 2 rubber gaskets) was replaced on both ends. I reassembled the carb, started the bike and sprayed the carb down with starting fluid. It didn't start revving so it looked like I had fixed the problem.
Now I can't seem to the bike to idle normally. It seems to start out ok, then after it warms up, the rpm's climb and drop and aren't consistent. I checked my valves, they are ok.
I've tried adjusting everything I can think of and even changed the needle settings.
Please give me the full list of what to check, how to adjust, what ever you can think of. Page 20 http://www.yamaha-motor.com.mx/Manual_P ... 2_1998.pdf