Yamaha YZF-R1S Service Manual - page 388
7-44
THROTTLE BODIES
FI
2. Adjust:
Ssub-throttle position sensor full open angle
a. Turn the nut
1
of the worm shaft of the sub-
throttle counterclockwise until it contacts
with the full open stopper.
b. When the dimension of
a
sections of the
throttle bodies #3 and #4 is measured with a
micrometer caliper, adjust with the adjuster
2
of the output shaft section of the sub-
throttle servo motor so that the dimension is
in a range from 24.2 to 24.6 mm (0.95 to 0.97
in).
A
Front side
B
Rear side
Sub-throttle dimension
a
24.2
X 24.6 mm (0.95 X 0.97 in)
c. After adjusting the dimension of
a
sections
of the throttle bodies #3 and #4, measure the
dimension of
a
sections of #1 and #2.
d. If the dimension of
a
sections of the throttle
bodies #1 and #2 is different from the dimen-
sion of
a
sections of the throttle bodies #3
and #4, adjust it to the same dimension as
the measurement value adjusted for the
throttle bodies #3 and #4, using the tuning
screw
3
located between the throttle bodies
#2 and #3.
3. Adjust:
Sprimary opening
a. After performing the full open angle of the
sub-throttle position sensor, turn the nut of
the worm shaft clockwise, measure the di-
mension of
b
section with a micrometer cali-
per or other device and adjust so that the di-
mension is in a range from 8.1 to 8.5 mm
(0.32 to 0.33 in).
A
Front side
B
Rear side
Sub-throttle dimension
b
8.1
X 8.5 mm (0.32 X 0.33 in)