I just got my Z20b yesterday, did a short test to make sure everything was working, then brought it inside where it’s warm and took off most of the covers.
I have the following goals with this tear down:
1) Install bank charging
2) Install PakTrakr
3) Check for loose/missing screws & nuts. Add washers where needed.
4) Check & fix cable routing and any loose electrical connections.
5) Silence that ugly noise that the turn signal makes.
6) Learn all that I can about this EV scooter, and EV’s in general.
7) Check the size of the power cables and upgrade if needed.
I wanted to do this all at once so I’m not taking on and off the covers all the time. Now that the covers are off, I’m glad I’m doing it this way because I don’t think the plastic covers on the Z20b could handle being taken on and off a bunch of times, especially the nose – I already broke off a small portion of a tab. Of course, it would be a lot easier if I had a maintenance manual! But I’m not holding my breath for that one. I’m hoping that there will eventually be a VifV maintenance manual based on our shared experiences.
Some preliminary observations: I found several loose and one missing fastener. In case of the missing fastener it was pretty funny. I was trying to take off the black plastic liner that surrounds the batteries under the seat. There are two nuts down low in the front. These nuts are hard to see because they are down in a well and very close to one of the batteries. I managed to get one of them out OK, but I could not seem to get my socket onto the other nut. What the hell is going on??? I could see that shiny nut on the black threads attached to the frame, why wouldn’t my socket grab it? Because the nut was really a washer! There was no washer under the other nut, so apparently the assembler was having trouble getting a nut on there because of how close the battery tray is to the bolt, and decided to put a washer on there instead! I’m guessing that the battery trays were welded a little too close to the bolt, and he just was not able to get it on there. I’ll know more when I try to put things back together.
The Z20b nose is difficult to take off. I had to learn by trial and error. The following pictures may help. I removed the nose as part of removing ALL of the covers, so don't take this as a tested procedure if you are just trying to remove the nose. Hopefully it will help.
Note slots on the edge; You might be able to see the slots better in the shadow. Tabs in the R/L nose fit into these slots.
Note the screw on the center midline of the right nose piece. You must take the center nose piece off before you can get to this screw. This means the center must come off first. You can also see the black frame member that accepts the screw for the left nose cover; it's difficult to see because of the black background. BTW, on left and right, this screw was VERY loose and would of probably fallen off after a little riding.
The center piece has tabs on the edge that will require that the center move up to disengage from the right and left nose pieces. There is a lip you can see in the upper right corner of the photo; that lip must be removed from the bottom of the center section before the center section will move.
There are 2 screws on the bottom/front of each L/R nose piece, plus one on the top/rear. There is also a large machine screw on the bottom side or L/R nose that must be removed. These are all pretty obvious and easy to get at.
Getting rid of the turn signal screech is easy once you have the cover off. The turn signal won't work if you just unplug it. Here is a photo of the unit disassembled.
1) Open up nose and locate the offensive piece.
2) It's attached by double sided tape. Rip it off. You will have to use a new piece of tape to reattach. (Note - it might be possible to pry of the housing and do all of this work without ripping off the double sided tape. If you do this, let others know).
3) Pry off the bottom of the unit where the wires come out. In the photo, I have partially reinserted the bottom. The black wire is unused.
4) Carefully remove the wires and the small circuit board from the housing.
5) That black cylinder in the lower right is the screecher already removed. Turn over the board and use a soldering iron to remove it. I pry gently on the screecher while applying the soldering tip until if comes loose; then repeat for the 2nd leg of the screecher.
6) re-assemble and reattach.
I’m new to EV’s, and might need some help from other members. Right now I’d like to hear opinions about where the best place would be to located the terminal strip for the bank charging and PakTrakr connections. I want a place that will stay dry, and hopefully allow for battery replacement without having to move the terminal strip.
It looks like the Z uses 8AWG wire. Rewiring would be a lot of work, but if I want to get more speed out of it, it may be worth it. Replacing this wire would be where I need the most help.