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Troubleshooting

Electric unicycle troubleshooting for InMotion, King Song and Begode

Safe checks for InMotion, King Song and Begode electric unicycles: what alarms and tiltback mean, charging and battery safety, official firmware updates, tire care and when to get a pro.

Last edited Nov 8, 2026 by Pedalwise team Edit History Add a subpage

The Pedalwise team started this page from official manuals, support pages and repair videos. Fixed this yourself, or spotted something wrong? Help improve it.

Battery and electrical safety. Lithium-ion batteries can catch fire if they're damaged or charged wrong. Never open a battery pack, and stop using any battery that's swollen, hot, wet or smells burnt. Every edit to this page is checked by a second person before it goes live.

This page covers safe checks for electric unicycles from InMotion, King Song and Begode (also sold as Gotway). A fault at speed can throw you, so electrical repairs belong with the maker or a qualified shop.

Electric unicycles run high voltage batteries. Never open the battery, controller or wiring, and never disable an alarm or tiltback. Take electrical faults to a pro.

Before you start

  • Note your model, voltage, serial number and firmware version. The Begode warranty page lists these as the details support asks for, plus any error codes, photos and videos.
  • Use the official app for your brand: the InMotion app, the KingSong app or the BEGODE app.
  • Power off fully before any check. InMotion's V11 tire guide lays the wheel on its side on a soft surface.
  • Check the recalls and safety notices below.

Alarms and tiltback: what they mean

Alarms and tiltback are there to make you slow down before the wheel runs out of power or overheats. When you hear one or feel the pedals tip back, ease off gradually and stop.

  • InMotion's FAQ says that above the speed limit the pedal gradually tilts to make you slow down, with an audio alarm.
  • The BEGODE app page recommends a power alarm at 80 percent and keeping power tiltback on, and says the final power safety alarm cannot be disabled.

Never raise speed limits, turn off alarms or tiltback, or load third party firmware to get more speed. These features are what keep you upright.

Common problems and what to check

Won't power on, or very slow

  1. Charge with the original charger only. The S18 manual says non original chargers must not be used.
  2. On InMotion V11 and newer, the FAQ says the wheel is limited to 5 km/h until activated in the app, and must take required firmware updates or it is disabled.
  3. If it shut off while riding, InMotion says to check faults in the app, upload logs and contact support.

Won't charge to full

  • InMotion's FAQ says to check the battery details in the app. A large voltage difference between packs may mean a damaged battery that needs replacing by support.
  • Dry the wheel and charge port fully before charging, as InMotion advises.
  • In storage, recharge about once a month, as InMotion's safe riding tips and the S18 manual both say.

See battery won't charge and battery care.

Fault message or error on the display

  • InMotion V12 and later show the fault in plain English, and the app has a fault detection page.
  • Begode says not to ride with unexplained controller errors, odd pedal angle or unclear firmware status.
  • Recalibrate in the app after a firmware update. Begode requires a horizontal calibration after updates, and the KingSong app includes gyro and horizontal calibration.

Firmware updates

  • Update only through your brand's official app.
  • Begode calls firmware updates not routine maintenance. Update when Begode recommends it or to fix a confirmed problem, since a failed update can leave the controller unresponsive.

Flat tire and tire pressure

  • Check the tire before every ride, as InMotion's safe riding tips say.
  • For the V11, InMotion's tire guide says 35 to 40 psi, checked monthly. Other models differ, so use your manual or ask support.
  • The King Song S18 manual gives no number, so ask Kingsong support.
  • A tire change means taking the motor out of the shell. InMotion's V11 guide uses tire levers, 4 and 5 mm Allen keys and a pump with a gauge. It suggests photographing the motor cable routing and slightly inflating the new tube so it does not pinch.

See fixing a flat.

Battery and charging safety

If a battery is swollen, leaking, hot, smells odd, makes noise or has been in water, stop riding and charging, do not power on, move it away from anything that can burn if safe, and contact the maker. Begode says not to open, repair, rebuild or balance a pack without its written approval.

Recalls and safety notices

  • Begode and Gotway MSP (MSuper Pro), Nikola+ and RS: CPSC lists a December 2022 fire hazard recall for units sold through ewheels.com. Owners should stop using them and get the free replacement battery. See the CPSC notice to check your wheel.
  • King Song KS-16S: CPSC issued a product safety warning in July 2022 about battery overheating and advises owners to stop using these wheels.

Videos

4K Video, How to replace the motor and tire on INMOTION V11 electric unicycle from INMOTION Global: the official V11 tire and motor job.
How To Change An Inmotion V11 Tire from ElectricUnicycles: another V11 tire walkthrough.
Kingsong 18XL Electric Unicycle Tire and Tube Change Tutorial from REV Rides: tire and tube swap on a King Song 18XL.
Begode ET Max, EUC Tire Tube Change for Beginners from Skyblaze103: a beginner tube change on a Begode.
How to replace tire or tube on your EUC (Electric Unicycle) fast from eRideLife: general unicycle tire and tube tips.

Official help

When to get a pro

  • Any battery, charger, controller, motor or wiring fault.
  • Repeated cutouts, odd pedal angle or errors that return after a restart.
  • A tire change if you are not confident removing and refitting the motor.

See when to call a pro.

Sources

Stuck after these checks? Find a shop near you.

Need a pro?

If these steps didn't fix it, find a shop near you in our partner network. For battery or wiring trouble, look for shops marked Battery and electrical.

Talk

Questions, things that worked for you, or something that looks wrong on this page.

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