Periodic maintenance and adjustment
Adjusting the engine idling speed
In this manual: Periodic maintenance and adjustment
2steps
~12min
1/5difficulty
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The engine idling speed must be checked and, if necessary, adjusted as follows at the intervals specified in the periodic maintenance and lubrication chart. The engine should be warm before making this adjustment.
- Remove panel A.
- Check the engine idling speed and, if necessary, adjust it to specification by turning the idle adjusting screw. To increase the engine idling speed, turn the screw in direction (a). To decrease the engine idling speed, turn the screw in direction (b).

Idle adjusting screw
Engine idling speed: 1300-1500 r/min
TIPIf the specified idling speed cannot be obtained as described above, have a Yamaha dealer make the adjustment.
- Install the panel.
Test yourself
A quick Yamaha YZF-R125 quiz: every answer comes with an explanation and a link to the manual page.
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