Hi I just bought a 80cc T80 motorized bicycle engine kit and broke it in. But I can not get it to run right. It only idles if I set the cable adjustments almost all the way out. And the idle screw does nothing. The bike will thenjoy start no problem and idle but has no power. When the motor run for a while and gets result warmed up it will atart running better and hit the power band but sparaticly surging power on and of only atwo full throttle.