I received my new EVO 2 weeks ago. It started with the 12k max RPM issues. I am now running a 120 jet and hit 14,200 no problem. It seems to bog down on the tight turns. I moved the needle clip to the bottom. what should my air screw be set at? It is 2.5 right now. I have read about adjusting the throttle to 85%. That goes against my core beliefs that you must make sure you have full throttle. I will try it. Any other suggestions are welcome.
I’m obviously no expert, so I apologize beforehand if my suggestion reflects that, but we had a very evil throttle response issue on a Junior with the Evo kit. Swapping to a different Evo carb fixed it, after fiddling with settings to no end. So you might not want to rule out that possibility and swap to a different carb (if you have access to it) just to see. Maxspeed accepted the bad carb as a warranty return.