Yamaha FINN - Adjusting the Engine Idling Speed; Adjusting the Throttle Grip Free Play

Periodic maintenance and adjustment
7-14
7
EAU21341
Adjusting the engine idling
speed
The engine idling speed must be
checked and, if necessary, adjusted as
follows at the intervals specified in the
periodic maintenance and lubrication
chart.
The engine should be warm before
making this adjustment.
TIP
 The engine is warm when it quick-
ly responds to the throttle.
 A diagnostic tachometer is need-
ed to make this adjustment.
1. Attach the tachometer to the
spark plug lead.
2. Check the engine idling speed
and, if necessary, adjust it to
specification by turning the throt-
tle stop screw. To increase the en-
gine idling speed, turn the screw in
direction (a). To decrease the en-
gine idling speed, turn the screw in
direction (b).
TIP
If the specified idling speed cannot be
obtained as described above, have a
Yamaha dealer make the adjustment.
EAU48434
Adjusting the throttle grip free
play
Measure the throttle grip free play as
shown.
Periodically check the throttle grip free
play and, if necessary, adjust it as fol-
lows.
TIP
The engine idling speed must be cor-
rectly adjusted before checking and
adjusting the throttle grip free play.
1. Idle adjusting screw
Engine idling speed:
1400–1600 r/min
1
a
b
1. Locknut
2. Adjusting nut
3. Throttle grip free play
Throttle grip free play:
3.0–7.0 mm (0.12–0.28 in)
a
12
3
b
UB6FE2E0.book Page 14 Tuesday, June 8, 2021 1:58 PM