bearings used on most rotating parts on pro-level
kits, bearings provide a way to eliminate almost all
of the resistance that bushings have and serve to
make the car quicker overall. For machine kits with
the standard shielded bearings (metal shields on the
side), just brush them off every now and then.
You may want to put a very light dab of oil and let
it soak into the bearing, but for the most part just
brushing the dirt off the bearing is fine. Now a days
rubber sealed bearings are used more frequently, which
require even less maintenance.
Bearings these days are being upgraded to rubber sealed
bearings. Make sure they are clean on the outside.
Wipe them free of any grease from the exhaust and
'road grime'. Check the bearings after each day of