My ET4 has 11,000+ miles. I had a reason to open the transmission. I believe it is a same transmission as in LX150. I thought I will share some pictures. The pictures are so much clear to see than drawings in owner's manual.


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
Forum member supplied image with no explanatory text
Forum member supplied image with no explanatory text
Forum member supplied image with no explanatory text
Forum member supplied image with no explanatory text