My dad thinks the gpx engine is just some cheap chinese engine. I used to have a sikkmx pit bike and the engine was junk with false nuetrals and stuff. What can i tell him to change his mind. I told him its a good quality engine that pitster has been running for some time now but that doesnt seem to get the point threw.I also told him there are tons of aftermarket parts for it so if something happened it would be easy to fix. What are some specs and some things that i could tell him to show him that its a good motor.