Yamaha YZF-R1 Series Service Manual page 200

8. Measure:
• Distance "a"
(between the rear wheel sensor rotor "1" and
rear wheel sensor "2")
Out of specification → Check the wheel bear-
ing for looseness, and the rear wheel sensor
and sensor rotor installation conditions
(warpage caused by overtorque, wrong in-
stallation direction, rotor decentering, LOC-
TITE® on the mounting surface of the rotor,
deformation caused by an impact during ser-
vice and caught foreign materials). If there is
any defective part, repair or replace the de-
fective part.
Distance "a" (between the rear
wheel sensor rotor and rear
wheel sensor)
1.3–2.1 mm (0.051–0.083 in)
TIP
Measure the distance between the rear wheel
sensor rotor and rear wheel sensor in several
places in one rotation of the rear wheel. Do not
turn the rear wheel while the thickness gauge is
installed. This may damage the rear wheel sen-
sor rotor and the rear wheel sensor.
Thickness gauge
90890-03268
Feeler gauge set
YU-26900-9
1
2
a
1
2
4-51
REAR WHEEL