Kawasaki DFI Code 64: Air Switching Valve — Fix
On Kawasaki motorcycles and scooters, DFI service code 64 means a fault in the air switching valve circuit — an emissions device that feeds air into the exhaust to reduce emissions.
- 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, or a failed air switching valve. 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 and year, so always confirm against your model’s service manual. After the fault is repaired the code is kept as a stored "history" code; clear it through Kawasaki’s service/diagnostic mode so the FI light goes out.
Symptoms
- FI light on with service code 64
- Possible popping on deceleration
- Little effect on normal running
How to fix it
- 1
Inspect the connector and wiring
1. Locate the air switching valve. 2. Reseat the connector and check the harness.
- 2
Test and replace
1. Check the valve operation. 2. Replace if faulty, then clear the code.
Frequently asked questions
Is code 64 serious?
Usually mild — it’s an emissions valve, so the bike runs but may pop on deceleration. Worth fixing to clear the light and keep emissions right.
Last updated July 16, 2026
Guidance only — always consult a qualified professional or the official service manual before carrying out repairs.