Just joined , helped my son with a Skyhawk 48cc installation, seemed to go Ok , just the usual snafu's when dealing with imported products. We are having trouble with the Carb though - it leaks a lot when not running - and throttle doesn't seem to do much either! when it runs it is full throttle or nothing - I did open it up and found a big burr where the idle adjustment screw was threaded in , cleaned that up but still having major leaks- are there any good troubleshooting guides for these carbs ?? When it is running this bike is a ton of fun !