Almost 4000 miles, and the motor gear has never been greased on my wife's bike. She uses throttle in 7th gear to help start. On uphill starts, I hear metal popping. Time to inspect the white gear,
1. This is the vertical bracket for holding the motor to the frame, Many people don't use it because it fits poorly and does little, Mine was like that, and , I had cut a deep notch in the bracket to allow a snug fit. The round fastener was just a few foot pounds past finger tight when I looked today. Only this bracket was holding it snug, Who knows. Maybe the motor was flexing in the frame, but I couldn't get it to move by hand.
By the way, you can see one of the hex head 3mm(?) screws for the cover. If I had had any better ones handy, I would have replaced them. With those round heads, the hex sockets strip easy, However, they only hold the cover and only need light torque.
2. The rest is pretty standard. You want to have a JIS Japanese phillips screwdriver for the four motor mounting screws. They're torqued in tight, and anything else will likely round off the heads.
3Here's the motor drive screw. Looks dry, but there is likely a thin layer of lube, I thought I saw slight shiny spots where it would contact the top and bottom of the nylon gear,
3. I was unable to remove the white gear, There might be a circlips on the other end. However, I didn't see any wear, or much grease.
4. Watch out for spacer washers on the white gear shaft, Easy to miss, and not replace on assembly,
5. Liberally applied Mobil red lube, I wondered how it will mix with the traces of old white grease left, I also put some 30Wt oil into the bearings I saw.
Put it all back together, Only lost one washer for one of the motor wire screws. I have tiny washers in my parts box, but none that small. I took one off the clip that holds the motor cables.
6. OK. Done.A few thoughts, The case cover has an o-ring for water sealing, The inside of this motor was clean and dry. We had ridden thru 6" of water earlier this year, and no apparent water entry, I was struck by the small size of the motor. Only 66 mm in diameter.
1. This is the vertical bracket for holding the motor to the frame, Many people don't use it because it fits poorly and does little, Mine was like that, and , I had cut a deep notch in the bracket to allow a snug fit. The round fastener was just a few foot pounds past finger tight when I looked today. Only this bracket was holding it snug, Who knows. Maybe the motor was flexing in the frame, but I couldn't get it to move by hand.
By the way, you can see one of the hex head 3mm(?) screws for the cover. If I had had any better ones handy, I would have replaced them. With those round heads, the hex sockets strip easy, However, they only hold the cover and only need light torque.
2. The rest is pretty standard. You want to have a JIS Japanese phillips screwdriver for the four motor mounting screws. They're torqued in tight, and anything else will likely round off the heads.
3Here's the motor drive screw. Looks dry, but there is likely a thin layer of lube, I thought I saw slight shiny spots where it would contact the top and bottom of the nylon gear,
3. I was unable to remove the white gear, There might be a circlips on the other end. However, I didn't see any wear, or much grease.
4. Watch out for spacer washers on the white gear shaft, Easy to miss, and not replace on assembly,
5. Liberally applied Mobil red lube, I wondered how it will mix with the traces of old white grease left, I also put some 30Wt oil into the bearings I saw.
Put it all back together, Only lost one washer for one of the motor wire screws. I have tiny washers in my parts box, but none that small. I took one off the clip that holds the motor cables.
6. OK. Done.A few thoughts, The case cover has an o-ring for water sealing, The inside of this motor was clean and dry. We had ridden thru 6" of water earlier this year, and no apparent water entry, I was struck by the small size of the motor. Only 66 mm in diameter.
