Miniwave Brake Sensor Test and AdjustmentUpdated 3 minutes ago

Both brake levers on your Miniwave have a built-in brake cut-off sensor that stops the motor whenever a lever is pulled. If a sensor is out of adjustment, it can cut motor power even when you are not braking. The good news is the sensors are easy to test and adjust.

This guide is a good place to start if:

• The display turns on, but there is no motor power from the throttle or pedal assist.
• Motor power cuts in and out while riding, but the display stays on.

Step 1 — Simple Checks First

Before testing the sensors, rule out these common causes:

• A brake lever was being held while the bike powered on.
• Fingers resting on a lever while riding (see Brake Cut-Off: Why Pedal Assist Stops).
• A lever that is damaged, or doesn’t spring all the way back.
• Brakes that need servicing, such as worn pads or a hydraulic bleed.

Routine brake maintenance may be all that’s needed.

Step 2 — Find the Brake Sensor Connectors

Unwrap the spiral cable wrap and follow the sensor wire from each brake lever to its plug. Depending on how the cables have been routed, the connectors can be near the handlebars, where the cables enter the frame, or just inside the frame under a rubber grommet (the grommet simply pulls out). The photos below show typical locations.

Step 3 — Test the Brake Sensors

The sensors are a safety feature, but the bike can run without them, so you can unplug them one at a time to find which one is causing the problem.

1. Make sure both levers are fully forward. Turn the bike off and on again. Pull each lever and let it snap back on its own a few times — don’t ease it back.
2. Unplug both brake sensor connectors.
3. Test the bike (on the stand or with a short, careful ride). If the problem has gone, one or both sensors are the cause.
4. Plug the right lever back in and test again. If the problem returns, the right lever sensor needs adjusting.
5. Unplug the right lever, plug the left lever back in and test again. If the problem returns, the left lever sensor needs adjusting.

If the problem is still there with both sensors unplugged, the sensors aren’t the cause — see Motor Assistance Cuts In and Out While Riding.

Getting home: you can leave a faulty sensor unplugged to ride home with assist, but remember the motor won’t cut out when you brake. Ride slowly and carefully, and fix or reconnect the sensor as soon as possible.

Step 4 — Adjust the Sensor

There are three screws involved:

1. Set screw — locks screw #2 so it can’t back out. It is very small, so don’t lose it if it comes out.
2. Sensor position adjuster — moves the sensor. Take care if you remove it; there may be a small spring inside.
3. Lever reach adjuster — sets how far the lever sits from the handlebar, which also affects the sensor.

To adjust:

1. Adjust screw #3 until 1–2 threads are showing.
2. Loosen set screw #1 so screw #2 can turn.
3. Turn screw #2 half a turn counter-clockwise.
4. Plug the problem sensor back in and test. If the problem is still there, turn screw #2 another half turn counter-clockwise and test again. Repeat until the problem is gone.
5. Check the motor does still cut out when you pull the lever. If it doesn’t, turn screw #2 a quarter turn clockwise and test again.
6. Tighten set screw #1 to lock the adjustment.

Important: These screws only adjust the sensor and lever position. Do not open the hydraulic brake system. If a brake feels soft, spongy or weak, have it serviced by a qualified bike shop before riding.

Need Help?

If the problem continues, contact Ridewave Support with photos or video of the issue and the checks you have already done.