I have a 2006 kawasaki ninja 250 which is experiencing some idle issues i’ve already troubleshot a lot of possibilities i thought it could be. It will idle at 4000+ rpm (it depends where the idle screw is set) i can get it to drop below 4000 if i back the screw out enough it will drop but then just die. i’ve gotten it to idle at 1500 rpm but it took a lot of idle screw play and a little stalling with the clutch but as soon i blip the gas it shoots right back up. i just bought a brand new clone which experiences the same issues. I have checked for any kind of air leak but i don’t think that is it as it’s not an inconsistent idle it constantly stays high. It also bogs hard past about half throttle not enough to shut the bike off but it feels like i just grabbed the front brake.
I’ve sprayed starting fluid all around the carb and nothing changed, i’ve check choke and throttle cables neither of which are the issue, i’ve tried richening the idle mixture i’ve tried leaning it out. just about anything i do changed nothing. if anyone could give me a little point in the right direction it would be greatly appreciated.