Yamaha MIO Service Manual page 65

ADJUSTING THE ENGINE IDLING SPEED
1
b
3
a
2
2. Remove:
• seat
• center cover
Refer to "REMOVING THE SEAT AND
SIDE COVERS".
3. Connect:
• engine tachometer
(onto the spark plug lead)
Engine tachometer
90890-03113
4. Check:
• engine idling speed
Out of specification → Adjust.
Engine idling speed (with head-
light on)
1,400 ~ 1,600 r/min
5. Adjust:
• engine idling speed
M MMM M MMM M M MMM
a. Turn the pilot screw 1 in or out until it is
lightly seated.
b. Turn the pilot screw out the specified num-
ber of turns.
Pilot screw setting
2-3/8 turns out
c. Remove the rubber cap 2.
d. Turn the throttle stop screw 3 in direction
a or b until the specified engine idling
speed is obtained.
Direction a
Direction b
e. Install the rubber cap.
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6. Adjust:
• throttle cable free play
Refer to "ADJUSTING THE THROTTLE
CABLE FREE PLAY".
Throttle cable free play (at the
flange of the throttle grip)
3 ~ 7 mm (0.12 ~ 0.28 in)
3 - 11
CHK
ADJ
M M MMM M M MMM M
Engine idling speed is
increased.
Engine idling speed is
decreased.
L L LLL L L LLL L
M MMM M MMM
L LLL L LLL