Karting??..

in the bag was the third bearing that goes next to the rear sprocket.. I guess that's taken out as well for more flexibility...

Less drag with it out also. I knew guys that would dig out the seals from the axle bearings and use a spray lube on them rather than let that factory grease behind the seals slow them down :realcrazy:. Every heat race, practice laps, whatever, they would use the spray cleaner to remove the track debris that glued itself to the bearings and relube them after :realcrazy:. Replace those bearings a couple times per season when they saw all the little pits in the rollers and races :realcrazy: