I just bought a brand new rok GP. It starts but will only run if I hold the throttle open. If you let off the throttle at all the engine stops running. I was told this is because the tolerances are tight and the engine just needs to be broken in. Is this true? I can sort of understand this, the friction between the engine parts being high. But I am not sure I believe.
I tried adjusting the idle screw and mixture screw, and the engine still doesn’t idle.