Super73 publishes a support page called "Initial Troubleshooting for your SUPER73". It lists what the company asks owners to do before they contact its technical support, and it covers the R-Series, the S-Series (S2 and S Adventure) and the Z-Series (ZX, Z Miami and Z Adventure).
The page does not tie any step to a symptom and lists no error codes. A bike that will not turn on or keeps cutting out is the kind of problem a first-steps list is for, but that pairing is ours, not Super73's. We walk through the page as written and keep our own comments separate.
Step one: check and reseat every connection
The page says to check and reseat all of the connections below, including the ones under the seat and at the motor, and to note any visible damage. Series labels in brackets are as the page writes them. The page does not restrict the other items.
- Battery to controller
- Controller to motor wiring harness (R-Series)
- Motor wiring harness to motor (R-Series)
- Controller to DC/DC converter (R-Series, S2, Adventure Series)
- DC/DC converter to secondary wiring harness (R-Series, S2, Adventure Series)
- Secondary wiring harness to headlight (R-Series, S2, Adventure Series)
- Secondary wiring harness to horn (R-Series, Adventure Series)
- DC/DC converter to tail light (R-Series, S2, Adventure Series)
- Controller to PAS wiring harness
- PAS wiring harness to PAS sensor
- Controller to primary wiring harness
- Primary wiring harness to display, throttle and brakes
- Primary wiring harness to horn button (R-Series, Adventure Series)
PAS stands for pedal assist sensor. The page does not say where each connector sits, so use your owner's manual. Switch the bike off before you unplug or reseat anything, and do not force a plug that will not seat.
Step two: check the SUPER73 app
The page asks you to connect to the bike through the SUPER73 mobile app, verify the connection and the proper operating mode, and install any pending updates. A yellow triangle in the app shows when an update is waiting. The page does not describe the operating modes, so check your manual.
Step three: the additional checks
- Pedal assist and throttle. Check whether the problem happens with both.
- Brake cutoff sensors. Disconnect the motor cutoff sensors at both brake levers and see if anything changes.
- Swap easily moved parts. If you have them available, swap parts such as the throttle, the display or the battery.
- Magnetic phone mounts. The page says a magnetic phone mount can interfere with the display. Take it off the bike and see if the problem remains.
- Battery charge. Confirm the battery is fully charged. If it is not, charge it to 100% and see if the problem remains.
Our notes on the order
These are our own suggestions, not Super73 instructions.
- Start with the checks that need no tools: a full charge, the phone mount and the app.
- The page does not say what a change with the brake cutoff sensors unplugged would mean. We would treat it as a pointer toward the brake lever sensor or its connector, not a diagnosis, and we would not ride with them disconnected.
- A swap only tells you something if the spare is known to be good. Write down each check and its result, because Super73 asks for a summary of your steps.
If the checklist does not fix it
The page says to submit a ticket that includes:
- a video showing the problem, with a quick summary of the steps you have taken;
- a screenshot of the firmware versions, taken in the app by opening the Vehicle tab and tapping the "i" at the top center;
- a copy of the receipt from when the bike was purchased, the frame serial number, and the serial number of any other part you suspect is involved.
What the page does not say
It does not match steps to symptoms, explain what a failed check means or show how to replace a part. It lists no error codes, and we have not found a code table published by Super73, so this guide does not explain any.
More checks that are not specific to Super73
Our guide to free e-bike checks before you buy parts is a general starting point for any bike. The e-bike repair DIY page maps common electrical symptoms to the check that finds them, and the e-bike repair online page has a three-minute self-check. This guide is about diagnosis only and does not say that any RideRow part fits a Super73. For other bikes, you can browse our e-bike spare parts.
Source: Super73's support page Initial Troubleshooting for your SUPER73, which shows a last updated date of Oct 30th, 2023, read on October 23, 2026. Support pages can change, so check the current version.
RideRow is an independent parts retailer and is not affiliated with, endorsed by, or sponsored by Super73. Super73 and model names are trademarks of their respective owners and are used here only to identify the bikes this guide covers.