Originally Posted by Jo Gutierrez

i like checking and replacing (if necessary) the clutch bearings every about 2 hours of runtime. replacing them don't hurt too bad because i get them from www.avidrc.com and they are only a buck each (the same price goes for all the other bearings for the car, by the way).

i also do some extra steps before installing new clutch bearings that make them roll faster/more free. and it also avoid excess grease to fly-off to the clutch which can cause slip.
1. blast off the stock grease inside the bearing using air compressor.
2. spray with motor cleaner or denature alcohol to get rid of the grease then blast with the air compressor again.
3. once they dry off, i lightly oil the bearings with light bearing oil.
these steps are pretty easy and quick but you will see the difference. spin the clutch bell with unprepped bearings and then try it with prepped ones. the prepped bearings make the clutch bell spin so much faster and longer.