Yamaha YZF-R1B 2012 Service Manual page 180

Manuals by Motomatrix / www.motomatrix.co.uk / The Solution For Lost Motorcycle Coded Keys
• The front speed sensor cannot be disas-
sembled. Do not attempt to disassemble
it. If faulty, replace with a new one.
1. Check:
• Front speed sensor "1"
Cracks/bends/distortion → Replace.
Iron powder/dust → Clean.
2. Check:
• Front speed sensor rotor
Cracks/damage/scratches → Replace.
Iron powder/dust/solvent → Clean.
TIP
When cleaning the front speed sensor rotor, be
careful not to damage the surface of the rotor.
3. Measure:
• Front speed sensor rotor deflection
Out of specification → Clean the installa-
tion surface of the front speed sensor
rotor and correct the front speed sensor
rotor deflection, or replace the front
speed sensor rotor.
Front
deflection limit
0.25 mm (0.0098 in)
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a. Hold the dial gauge at a right angle against
the front speed sensor rotor surface.
b. Measure the front speed sensor rotor
deflection 2.0 mm (0.08 in) below the edge
of the front speed sensor rotor.
email: info@motomatrix.co.uk
speed sensor rotor
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4. Adjust:
• Front speed sensor rotor deflection
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a. Remove the front speed sensor rotor.
b. Rotate the front speed sensor rotor by 2 or
3 bolt hole.
c. Install the front speed sensor rotor.
ECA1CW1401
Replace the brake disc bolts with new
ones.
TIP
• When installing the brake disc and front
speed sensor rotor, align the arrow "1" on the
brake disc, arrow "2" on the front speed sen-
sor rotor and arrow "3" on the front wheel in
the direction of wheel rotation.
• Tighten the brake disc bolts in stages and in
a crisscross pattern.
Brake disc bolt
18 Nm (1.8 m·kgf, 13 ft·lbf)
LOCTITE®
d. Measure the front speed sensor rotor
deflection.
e. If out of specification, repeat the adjust-
ment steps (a) through (d) until the front
speed sensor rotor deflection is within
specification.
4-21
FRONT WHEEL