Make any RC Ball Bearing Racing Grade

First, do not attempt this modification without eye protection. Further, be prepared to ruin a few bearings, and No. 11 hobby blades as you get the hang of it.

This tip will work with any shielded type ball bearing, but works better on rubber sealed types. Simply pry out one side of the shield. Be aware that the metal tip of the knife blade can break and fly off, and of course, slipping is always a cutting hazard. Reinstall the bearing with the shielded side outward, facing any exposed dirt. Idler gear and internal top shaft bearings can have both shields removed since the transmission is normally sealed. 

This reduces friction by eliminating one side of the bearing race contacting the shield. Increased maintenance may be required, however, if you keep things clean I have never known it to be an issue. This does make a noticeable increase in speed, lowering lap times, and has been a sponsored speed secret for a number of years quietly kept under wraps. Just don't tell anyone...

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