Suspension Upgrade 🛴 S22 Electric Unicycle

I have several unicycles that I use, one of which is an s22 by KingSong. That is the one I'm working on today.

The wheel was already taken apart when I started this project. Let me tell you why. A friend that I ride with, in our riding club, had his battery diagnosed as bad. I double checked that and I found out that the battery management system (BMS) was bad and it caused several cells to go bad as well. So I pulled a battery out of mine and sold it to him.

I am waiting on a new BMS to arrive from China (where everything is made). When the BMS arrives I will be doing another post on that job. Here is a shot of the bad BMS.

...And another shot of the only fully assembled and functional battery that I have at the moment.

Since my wheel was down anyway, I ordered new roller sliders for the suspension, and upgrade of sorts, those arrive today.

The first step is to take off the main board, which I already had off when I started. Then you remove the two pins that hold the suspension to the unit and the wheel separates from the main body.

Below is the main body flipped upside down, and you can see the empty holes on both sides where the batteries slide in.

You can also see the four channels where the roller bearings go at the ends of the battery holes. That will become clear when you see what the suspension bearings look like on the other part of the wheel.

The suspension upgrade kit comes with four aluminum rails and many, many roller bearings, some of which I put on the rail at the kitchen table when I got home. Then I decided to make this post.

You cannot put all of the roller bearings on the rail because you would cover some of the mounting points.

I am pretty hard on my wheel, even going as far as to descend staircases.

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I actually broke this while driving and several of the roller bearings fell out. The above close up of the damage is a comparison of the two rails, and I'll show you another one in a bit. I am pointing out the part that broke. (no, it did not break while heading down these stairs.)

Back to the project.Now that I have the alluminum bar mounted to the hub frame, I can put the other roller bearings on.

The next steps are pretty mundane. It involves cleaning the channels where the sliders (rails) go and the fender and other parts right before assembly.

Here is a shot of the inside of the suspencion channel, where the roller bearings smooth my ride.

I will do a part two of this post when I get the stuff I need for making a new battery, the BMS and cells to solder. I think I have enough battery cells to complete the job at that time, but it does me no good to assemble the suspension until I have all of the other parts. So I will leave it here. Watch for the next post and hopefully a test drive video.

In the mean time, I am thinkng about cleaning and painting the body to prevent rust. The upgrade is installed and ready - the assembly will be part of the next post.

Thanks for checking out my work. There is a lot more where this came from.

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