Someone i know has an escos and its running a bit badly at mo,wen it gets to running temp it starts reving up n down by itself,and wen he accelerates its goes alright till you back off then accelerate again and it has a flat spot on acceleration so far he has changed throttle postion switch,dizzy cap,rotor arm,coil,ignition amp,plugs,and has disconnected the amal valve and fitted ableed valve and its still doing it,anyone have any ideas??

Cheers