61U5H11
3-6
9
8
7
6
5
4
3
2
1
3.
Turn the throttle stop screw
3
in direc-
tion
a
or
b
until the specified engine idle
speed is obtained.
NOTE:
9
To increase the idle speed, turn the throttle
stop screw in direction
a
.
9
To decrease the idle speed, turn the throttle
stop screw in direction
b
.
4.
If the specified engine idle speed cannot
be obtained, adjust the pilot screws.
NOTE:
When adjust the pilot screws, adjust it in the
all of cylinders.
Adjusting the throttle cable
NOTE:
Before adjusting the throttle cable, the throt-
tle stop screw should be properly adjusted.
1.
Loosen the locknut
1
, remove the nut
2
and then remove the throttle cable joint
3
.
8.
Tighten the throttle lever tightening screw
4
counterclockwise on the lower carbu-
retor.
NOTE:
The screw
4
is left hand thread.
9.
Make sure the throttle valves are open
and close simultaneously.
10. Install the throttle cable and intake
silencer.
NOTE:
After synchronizing the carburetor, start the
engine and check the engine idle speed to
adjust the throttle stop screw.
Checking the engine idle speed
NOTE:
Before checking the engine idle speed, the
pilot screws should be properly adjusted.
1.
Attach the special service tool
1
to the
spark plug wire #1
2
.
2.
Start the engine and warm it up for 5 min-
utes, and then check the engine idle
speed. Adjust if out of specification.
NOTE:
Verify the stability of the engine idle speed.
61U30220
a
b
3
1
2
61U30040
Digital tachometer
1
: 90890-06760
Engine idle speed:
700–800 r/min
Control system
1
2
3
61U30080
61U5H11_03 05.10.13 11:43 AM Page 7
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Страница 256: ...YAMAHA MOTOR CO LTD Printed in Japan Oct 2005 1 2 1 E_1 Printed on recycled paper E115A 115B 140B ...