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].

yamaha-motorcycle-co-volume-adjustment-via-motomaster-1

yamaha-motorcycle-co-volume-adjustment-via-motomaster-2

yamaha-motorcycle-co-volume-adjustment-via-motomaster-3

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].

yamaha-motorcycle-co-volume-adjustment-via-motomaster-4

yamaha-motorcycle-co-volume-adjustment-via-motomaster-5

yamaha-motorcycle-co-volume-adjustment-via-motomaster-6

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.

yamaha-motorcycle-co-volume-adjustment-via-motomaster-7

yamaha-motorcycle-co-volume-adjustment-via-motomaster-8

yamaha-motorcycle-co-volume-adjustment-via-motomaster-9

yamaha-motorcycle-co-volume-adjustment-via-motomaster-10

Additional Resources

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


Support: www.obd2shop.co.uk

OBDSTAR P50 Toyota Encrypted Airbag Crash Data Reset Guide

The OBDSTAR P50 supports crash data reset for Toyota encrypted airbag modules. In this example, we will demonstrate how to clear crash reco...