Hello just completed my first build with a zoombicycles 66cc engine kit. Had a little trouble starting it up and found out spark plug was out of wack. Got it fixed and she runs. Few problems though the thing just flys even without applying any throttle. Can't slow down without killing the engine. I'm assuming it's just the idle screw and throttle cable which way should I turn the idle screw and how do I back the throttle cable off. I can't even engage the clutch while the engines running it starts revving like crazy if I try.