spur geaar

[welsh man]

i recently purchased this for bashing
http://www.nitrotek.co.uk/A2003T.htm
my problem is the spur gear i was using it down the park and then it suddenly stopped then i looked at it and all the teeth off the spur gear had gone,:confused:
i want to know can you buy a aluminium gear for it and how can i avoid this problem again?
thanks

[littlened]

I have little knowledge compared to others on here, but to me it sounds like the spur and pinion were not setup correctly in the first place, or the motor has moved.

Almost every car I've seen has a plastic spur, and they last forever as long as they're setup right.

When I setup the position of the motor, I do it so that there is a slight gap between the pinion and spur. They shouldn't be right up against each other. The spur should have a little play on it before it touches the pinion, but on the other hand they shouldn't be right on the edge of each other, this increases the changes of it slipping and ripping the teeth off.