what car do you have?
if its a belt, you can clip every 2 teeth off the belt,
clean out your bearings after 2-3 race weekends, then put the clear lube in them
if your racing put in a front one-way
(not suggested for bashing, you will need the braking when ur and your friend are coming head on, trust me, i made that 50 buck mistake)
take out any bushings you may have, and put in ball bearings