Kawasaki DFI Code 25: Speed Sensor — Fix
On Kawasaki motorcycles and scooters, DFI service code 25 means a fault in the vehicle speed sensor circuit — the sensor that reports road speed to the ECU and speedometer.
- Applies to
- Kawasaki motorcycles
- Est. repair cost
- $20 – $130
- Time to fix
- 30–90 minutes
What it means
Common causes are a loose/corroded connector, damaged wiring, debris on the sensor tip, or a failed sensor. This is a Kawasaki DFI (Digital Fuel Injection) service code, read through the FI light or the bike’s service/diagnostic mode. It applies to Kawasaki FI models such as the Ninja, Z, Versys, and ZX range. Note: Kawasaki service-code numbers can vary by model — confirm against your manual. After the fault is repaired the code is kept as a stored "history" code; clear it through Kawasaki’s service/diagnostic mode.
Symptoms
- FI light on with service code 25
- Speedometer erratic or dead
- Possible minor fuelling effects
How to fix it
- 1
Inspect the speed sensor and connector
1. Locate the speed sensor (gearbox/final drive). 2. Reseat the connector and clean debris from the tip.
- 2
Check the signal and replace
1. Confirm the sensor pulses as the wheel turns. 2. Replace if dead, then clear the code.
Frequently asked questions
Why is my speedometer dead with code 25?
The same sensor feeds the ECU and the speedometer, so a circuit fault often knocks out the speed reading too.
Last updated July 16, 2026
Guidance only — always consult a qualified professional or the official service manual before carrying out repairs.