Originally Posted by caltek1

KREATOR1,

You can fit a 21 tooth in without doing anything to the chassis, just bolt in the normal position for 20 tooth. Larger can be fitted, however you can only put one screw in to hold the motor.You would also need to use a spacer so that you do not strip the spur gear.

I have never tried this myself, but have seen it used. Was fast in a straight line, but couldn't corner due to excessive speed.

However this goes against the spirit of mini racing. Personnally I think its waste of time, but each to there own.

Regards,

Calvin