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Which drive system does my Yamaha Bicycles e-bike use?

JapanCity, MTB, own system

Yamaha Bicycles fits its own PW series drive units across the city and MTB ranges it sells as complete bicycles, drawn from the PW, PW-X, PW-X2, PW-X3, PW-ST, PW-TE, PWseries SE and CE families. A PWseries badge on the frame only confirms the motor family, not the sub-variant, and the exact PW model, display generation and wiring harness all change which two-digit Er codes can appear. That is why a Yamaha-branded badge alone is not enough to decode a fault. To work out what is actually on your bike, read the motor and display directly, then record the full Er number before clearing the code or swapping parts.

How to check on your own bike

  1. Switch the system on and read the model name printed on the motor housing, typically on the lower edge near the crank or under a cover at the bottom bracket.
  2. Note which display is fitted, including its shape, screen type and button layout, because the same Er code is rendered differently across Yamaha display generations.
  3. Try pairing the bike with a smartphone if it has Bluetooth, and record which app it accepts, since the pairing procedure differs between PWseries generations.
  4. Look for the type plate or sticker on the frame (usually on the seat tube or inside the battery mount) and write down the model code, frame number and any drive-system line printed on it.
  5. Cross-check the motor label, display model and type plate against your original purchase invoice or the Yamaha Bicycles owner documentation to confirm the exact PW sub-variant on the bike.
  6. If anything still does not match, photograph the motor label and the display at power-on and send the images to a Yamaha Bicycles service point for identification.
Error codes for Yamaha PW

Frequently asked

Which motor does Yamaha Bicycles use?

Yamaha Bicycles fits its own PW series drive units on the complete bikes it sells, drawn from the PW, PW-X, PW-X2, PW-X3, PW-ST, PW-TE, PWseries SE and PWseries CE families. The same PWseries units are also sold to other brands, so the badge on the frame only confirms the family and not which sub-variant is on a given bike.

How does a Yamaha Bicycles error code appear on the display?

On a Yamaha Bicycles display a fault shows as the letters Er alternating with the riding screen, with a two-digit number shown in the function display. The two-digit value is what you quote to a workshop, not the word Er.

Does the frame badge tell me which Er codes my bike can show?

No. The PWseries badge only confirms the motor family; the actual list of Er codes depends on the exact PW sub-variant, the display generation and the wiring harness fitted to that particular bike.

Still stuck? Take a photo of the display and show it to a local e-bike workshop. Bring the bike's system name (e.g. Bosch Performance Line CX) and the exact code; that saves diagnostic time and money.

Official source: cdn2.yamaha-motor.eu