GS125 Rear wheel and hub bearing replacement

[linuxrob]

There are a few things to to consider when replacing rear wheel bearings on a GS125, also when you change the sprocket hub bearing.

The bearings are:

Sprocket hub bearing 6204

Left side wheel bearing6202

Right side wheel bearing 6302

All bearings are C3 clearance. I also chose bearings with 2 rubber seals (2Z).

Before removal I noted the position of the bearing in relation to the hub.

The left hand side is recessed approx 10.36mm into the hub. The right hand side is flush with the hub.

 

 

T he first bearing to remove is the left hand side or the sprocket side (6202). To do this safely the wheel should be supported on blocks of wood to allow the bearing to drop out fully. With this and the spacer out the wheel is turned over and the right or brake side bearing (6302) can be drifted out.

After cleaning the inside of the wheel hub the right hand side bearing (6302) is drifted in first. It fits flush with the hub. The spacer can be fitted any way round followed by drifting in the left hand bearing (6202) to the same depth as measured earlier.

Rear hub bearing replacement

The rear hub bearing on the GS125 is a 6402 C3 bearing. After the hub assembly is removed from the wheel the small spacer and rubber dust seal are easily removed. Unlike my Bandit and Z500 rear hub the spacer / adaptor behind the bearing cannot be just pulled back to drift the bearing out. The spacer / adaptor is used to drift the bearing from the rear. My 17mm ½” drive socket is the perfect fit on the space / adaptor for drifting.

The new bearing has to be fitted to the cleaned spacer / adaptor then fed into the hub from the front before being drifted fully home.

Di all this when the rear wheel was out to fit my new 3.00" x 18 K82  rear tyre.