That was my concern with those. The metal that they use must not be machined, pot metal is tragically bad. I remember as a kid i had the ricky charmichael bike (i think that was the one) and i thrashed that plastic toy grade for almost a year before the rider was only a set of legs with a waist lol. I have heard of gyro issues being common on some of those and there being an upgrade to remedy it but it has been a while since i have done serious research into the matter and honestly cant remember. Sucks you are having such lame issues right off the bat.