As Arjen mentioned, there is no way of adjusting the CO on an XTZ without the plug-in Yamaha diagnostic tool.

TBH, altering the CO setting achieves very little on a Z which isn't prone to surging, unlike X/R models. The CO setting only adjusts the fuelling at idle and <2% throttle. Adjustments can help smooth out a lumpy idle, but that's about it. You'd be hard-pushed to notice the difference in settings on the road.

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