I have a '01 F900SX, which has the Coda Expert Cartridge Bearing in the rear wheel hub. There is no play it doesn't rotate very smoothly. Not grinding, but a bit notchy. I opened up the dust caps and saw that all the ball bearings are good.

With such an old bike, I really want to kinda change the bearings but how? Also, how do I change the freehub? This thing skips gears once in a while when I stomp on it on some steep climbs. I think it's the freehub and not the cassettes.

Anyway, I just want to know how to change out the bearings and the freehub on my rear axle. Thanks!