CFMoto motorcycle rough idle after battery change: idle relearn
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Applies to: CFMoto 450SR, 450SS, 400GT and 650 series
Symptoms
- Idle too low or hunting after battery work
- Stalls when coming to a stop
- Check engine light after cleaning the throttle body
Why it happens
The ECU stores learned idle values. Disconnecting the battery or cleaning the throttle body throws them off until they're relearned.
How to fix it
- Check the battery is fully charged and terminals are tight.
- Follow the manual's throttle and idle relearn steps with the engine warm.
- Check intake boots for air leaks.
- Read and clear any stored codes.
Tools and parts
- Battery charger
- Diagnostic tool
What the factory service manual covers
Fuel injection: idle relearn, throttle body service, fault codes. The full procedure, specs and wiring diagrams are in the factory service manual for your machine.