Step 1 - Drain hub oil, remove muffler, rear tire, rear brake drum, etc.
Step 1- Following owner's manual remove 7 screws with an allen wrench.
Step 2 - Two halves of transmission will separate.
Some things I learned are:
1- A hub can take a lot more oil than the maximum as indicated on a dip stick (object #4 in picture).
2- Gear #1 will come off if a nut is let loose on the other side (nut holding clutch axle to transmission cover). Gear #2 easily comes off. Gear #3 comes off with a firm pressure.
3 - I don't know how but some dirt and sand got into my transmission (there should be a small filter). I used a carburator cleaner to clean these off.
4 - Owner's manual recommends using a new gasket (#5) when putting together a transmission. Well my gasket looked fine, so I just reused the old one, and it didn't leak afterwards when I added hub oil, so....
5- I didn't try removing the bearings. According to owner's manual one needs a bearing extractor. Not sure whether these can be removed without an extractor. The three bearings looked identical.
6 - When putting together my bike, I used a little grease between wheel axle, washer, and rear wheel and my rear wheel now rotates much more freely.
7- Use some antiseize lubricant on the 7 screws that hold two halves of transmission casing together.
Enjoy
