Yamaha YZF-R125 Service Manual: Checking the lean angle sensor

1. Remove:

  • Lean angle sensor

2. Check:

Lean angle sensor output voltage Out of specification Replace.


a. Connect the lean angle sensor to the wire harness.

b. Connect the pocket tester (DC 20 V) to the lean angle sensor coupler as shown.


Positive tester probe
yellow/green "1"

Negative tester probe
gray/black "2"

Checking the lean angle sensor


c. Set the main switch to "ON".

d. Tilt the lean angle sensor to 65.

e. Measure the lean angle sensor output voltage.

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