Wednesday, 6 May 2026

Technical Guide: Yamaha Motorcycle CO Volume Adjustment via MOTOMASTER

Proper CO adjustment helps maintain engine performance and emission standards. Follow these steps to complete the adjustment using your OBDSTAR MOTOMASTER.


Tools Required:

OBDSTAR MOTOMASTER tablet


Step-by-Step Procedure

1. Initial System Entry

Power on your device and tap [DEMO] (or enter via the live diagnostic menu).

Locate and select Yamaha from the list of manufacturers.

Select [Common Special Functions].

Select [Idle Speed Adjustment].

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2. ECU Activation

Follow the on-screen prompts to turn the ignition switch OFF and then back ON.

To activate the ECU, select [Temporary Activation].

From the function list, tap [CO volume adjustment 3].

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3. Adjusting the CO Values

Carefully read and follow the on-screen safety instructions.

Tap [Change Mode] to enable the adjustment interface.

Select the specific cylinder and adjust the CO value by [Step ON] or [Step down] the levels as required by the engine specifications.


4. Completion

Once the desired levels are set, tap [Back] to save the settings and exit the function.

The system will confirm that the Yamaha CO adjustment is concluded.

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Additional Resources

For a detailed visual demonstration, you can view the video guides at:


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Technical Guide: Yamaha Motorcycle CO Volume Adjustment via MOTOMASTER

Proper CO adjustment helps maintain engine performance and emission standards. Follow these steps to complete the adjustment using your OBDS...