Tubeless Conversion For Gotway Begode Mten3 Electric Unicycle Repair Guide

Difficulty

Difficult

Steps

Time Required

                          45 minutes - 2 hours

Sections

Tubeless Conversion for Gotway Begode Mten3 electric unicycle
17 steps

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Introduction

A very special thanks to @Declan acoustic-unicyclist for the zip-tie trick.

What you need

Step 1

              Remove bezel

The two bezel pieces are each secured by a pair of hooks at the bottom of the wheel well. Pry to lift the hook by pushing the bezel toward the top of the machine (forward in the photo), rather than prying the bezel away from the machine.

The two bezel pieces are each secured by a pair of hooks at the bottom of the wheel well. Pry to lift the hook by pushing the bezel toward the top of the machine (forward in the photo), rather than prying the bezel away from the machine.

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Step 2

              Remove all edge screws

Remove the four edge screws with a #1 Phillips screwdriver. Turn the Mten3 over. Remove the additional four edge screws.

Remove the four edge screws with a #1 Phillips screwdriver. Turn the Mten3 over. Remove the additional four edge screws.

Step 3

              Remove Left Foot Pedal

Lay the machine left-side-up (anti-spin switch facing up)
Remove the two 5mm hex Allen set screws, one at each end of the left foot pedal
Use the Allen tool to push the hinge pin in so it protrudes at the other end, and then remove the hinge pin
Set aside the foot pedal, Allen screws, spacers, and hinge pin

Lay the machine left-side-up (anti-spin switch facing up)

Remove the two 5mm hex Allen set screws, one at each end of the left foot pedal

Use the Allen tool to push the hinge pin in so it protrudes at the other end, and then remove the hinge pin

Set aside the foot pedal, Allen screws, spacers, and hinge pin

Step 4

              Remove left shell mounting screws

Remove the screws that mount the left half-shell of the housing to the motor.
This may require you to remove the pad. To explain the photo, I installed a jump pad home-made from exercise mat. I used a small magnet to locate the closure magnet for reference, and an awl to locate the screws and then punch access holes.

Remove the screws that mount the left half-shell of the housing to the motor.

This may require you to remove the pad. To explain the photo, I installed a jump pad home-made from exercise mat. I used a small magnet to locate the closure magnet for reference, and an awl to locate the screws and then punch access holes.

Step 5

              Deflate the inner tube completely

Use a removal tool to remove the Schrader valve core to relieve the inner tube of any remaining pressure.

Use a removal tool to remove the Schrader valve core to relieve the inner tube of any remaining pressure.

Step 6

              Detatch the light strip

Detatch the LED strip starting at the back of the Mten3.
You will not be unplugging the strip, so be careful it won’t be damaged. For example you could temporarily tape it to the right half-shell of the vehicle

Detatch the LED strip starting at the back of the Mten3.

You will not be unplugging the strip, so be careful it won’t be damaged. For example you could temporarily tape it to the right half-shell of the vehicle

Step 7

              Remove left half-shell of case

Open the case, starting at the wheel well. If you have followed this procedure before, you will need to tear the seal above the wheel well.
If the case is not opening easily, be certain a screw is not still engaged.

Open the case, starting at the wheel well. If you have followed this procedure before, you will need to tear the seal above the wheel well.

If the case is not opening easily, be certain a screw is not still engaged.

Step 8

              Electrical Safety

Once you open the case, the electrical components will be relatively exposed. The battery has enough voltage to shock you. Foreign objects (FOD), dripping sweat, dropped tools, pulled connector mates and cable ends, or flexed wires could have unintended consequences including malfunction of safety features.
Lay the halves of the case open side by side so that the wiring for the anti-spin-out switch is slack
Disconnect the battery. Cover the battery connector, for example with tape or a small plastic bag.
Cover the battery and controller with a shop rag or towel.

Once you open the case, the electrical components will be relatively exposed. The battery has enough voltage to shock you. Foreign objects (FOD), dripping sweat, dropped tools, pulled connector mates and cable ends, or flexed wires could have unintended consequences including malfunction of safety features.

Lay the halves of the case open side by side so that the wiring for the anti-spin-out switch is slack

Disconnect the battery. Cover the battery connector, for example with tape or a small plastic bag.

Cover the battery and controller with a shop rag or towel.

Step 9

              Remove the tire (zip tie method)

The zip-tie method should allow you to remove the tire entirely, without using tools.
Thread at least five zip ties between the rim and the tube/tire, all the way through the channel, equally spaced around the rim.
For each zip tie, press the two tire beads together, with the tube inside the tire. Snug the zip tie so the beads are held closed together. This will allow the beads to drop into the channel at the center of the wheel.
It is now possible to pull the tire off-center and work it over the rim. A flat-blade screwdriver can be used, but hand strength may be sufficient.
The zip ties can be salvaged by inserting a knife blade between the tongue and tail to disengage the ratchet of the zip-tie fastener.

The zip-tie method should allow you to remove the tire entirely, without using tools.

Thread at least five zip ties between the rim and the tube/tire, all the way through the channel, equally spaced around the rim.

For each zip tie, press the two tire beads together, with the tube inside the tire. Snug the zip tie so the beads are held closed together. This will allow the beads to drop into the channel at the center of the wheel.

It is now possible to pull the tire off-center and work it over the rim. A flat-blade screwdriver can be used, but hand strength may be sufficient.

The zip ties can be salvaged by inserting a knife blade between the tongue and tail to disengage the ratchet of the zip-tie fastener.

Step 10

              Inspect and clean the bead of the rim

Inspect the inside of the wheel rim where the tire bead was seated, visually and by feel. Use sand-paper to remove any corrosion or gouges.
If the tire bead is damaged (for example because of using a screwdriver during tire removal), you will need a replacement tire.

Inspect the inside of the wheel rim where the tire bead was seated, visually and by feel. Use sand-paper to remove any corrosion or gouges.

If the tire bead is damaged (for example because of using a screwdriver during tire removal), you will need a replacement tire.

Step 11

              Install a tire valve stem

Apply a non-corrosive non-solvent lubricant/sealant. I used Armor-Dilloz Bead Buddy because I had it, worked great. Dish detergent would probably work well enough. Don’t use a grease like faucet lube as it won’t ever set, and so the stem will spin when you tighten or loosen the cap.
Insert the stem from inside the wheel. Screw a valve extender onto the stem and use it to pull the stem until it pops into place.
Remove the valve core and set it aside.

Apply a non-corrosive non-solvent lubricant/sealant. I used Armor-Dilloz Bead Buddy because I had it, worked great. Dish detergent would probably work well enough. Don’t use a grease like faucet lube as it won’t ever set, and so the stem will spin when you tighten or loosen the cap.

Insert the stem from inside the wheel. Screw a valve extender onto the stem and use it to pull the stem until it pops into place.

Remove the valve core and set it aside.

Step 12

              Install the tire

If the bead of the original tire is not damaged, that tire can be used. Otherwise a replacement tire can be ordered for example from eWheels.
Seal and lubricate the bead. I used Bead Buddy. Dish detergent might be a ready alternative. Apply to the bead area of both sides of the tire. Apply to the bead area inside both sides of the wheel.
Prepare the tire for installation by cinching the beads together using zip ties.
Slide the tire onto the wheel. This should be a fairly quick and easy manual operation.
Remove the zip ties.

If the bead of the original tire is not damaged, that tire can be used. Otherwise a replacement tire can be ordered for example from eWheels.

Seal and lubricate the bead. I used Bead Buddy. Dish detergent might be a ready alternative. Apply to the bead area of both sides of the tire. Apply to the bead area inside both sides of the wheel.

Prepare the tire for installation by cinching the beads together using zip ties.

Slide the tire onto the wheel. This should be a fairly quick and easy manual operation.

Remove the zip ties.

Step 13

              Set the bead

The valve core is still removed. Using a hand-pump, inflate quickly and slightly over pressure. You may hear a popping noise as the bead drops into place, but I did not.

The valve core is still removed. Using a hand-pump, inflate quickly and slightly over pressure. You may hear a popping noise as the bead drops into place, but I did not.

Step 14

              Add sealant and inflate tire

Add tire sealant as directed. I used 2 oz of Armor-Dilloz Red.
Reinstall the valve core
Reinflate the tire to 30 psi

Add tire sealant as directed. I used 2 oz of Armor-Dilloz Red.

Reinstall the valve core

Reinflate the tire to 30 psi

Step 15

              Reassemble the case

Apply a bead of sealant at the top of the wheel well as a barrier to forceful water and dust penetration from the wheel well into the electrical power and electronics housing.
Silicone bathtub caulk is working for me. In my experience it is easily tearing loose when I need to open the case. I looked for some “H-channel” but couldn’t find a source.
Do not clean the surfaces. Or treat at least one surface with a chemically compatible releaser like Armorall. This won’t be the last tire you change, so you you want to fill the gap but not adhere permanently.
Mind the anti-spin switch wiring. Brand new my Mten3 had glitchy erratic behavior blamed on this wire being pinched at the factory.
Mind the alignment of the plastic fingers on the power panel.
Mind any other gaps that aren’t closing or snapping together, they might be crushing wiring.

Apply a bead of sealant at the top of the wheel well as a barrier to forceful water and dust penetration from the wheel well into the electrical power and electronics housing.

Silicone bathtub caulk is working for me. In my experience it is easily tearing loose when I need to open the case. I looked for some “H-channel” but couldn’t find a source.

Do not clean the surfaces. Or treat at least one surface with a chemically compatible releaser like Armorall. This won’t be the last tire you change, so you you want to fill the gap but not adhere permanently.

Mind the anti-spin switch wiring. Brand new my Mten3 had glitchy erratic behavior blamed on this wire being pinched at the factory.

Mind the alignment of the plastic fingers on the power panel.

Mind any other gaps that aren’t closing or snapping together, they might be crushing wiring.

Step 16

              Check clearances

I used a black plastic valve cap to keep the debris out of the valve.

I used a black plastic valve cap to keep the debris out of the valve.

Step 17

Reassemble the shell, screws, foot pedal, LED strip, and bezel in reverse order of disassembly.
Perform an intermediate test at the first stage that is safe to do so.
Gear up (helmet, wrist guards, knee pads, elbow pads, all that) for a test ride.

Reassemble the shell, screws, foot pedal, LED strip, and bezel in reverse order of disassembly.

Perform an intermediate test at the first stage that is safe to do so.

Gear up (helmet, wrist guards, knee pads, elbow pads, all that) for a test ride.

To reassemble your device, follow these instructions in reverse order.

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Author

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                    Student4Life

Member since: 05/27/2017

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Julien Couvreur - Jun 1, 2022

Thanks for the instructions!

Just want to add that I was told (by eWheels folks) that the tire from the Ninebot also fits on the MTEN3.

The tire from the Ninebot is available (for example here: https://www.ebay.com/itm/294319386406) whereas the tire from the MTEN3 is on backorder.

Member-Contributed Guide#

Introduction#

What you need#

Member-Contributed Guide

Introduction

What you need