9-21
9
TIP
If the specified idling speed cannot be obtained as
described above, have a Yamaha dealer make the
adjustment.
EBU38470
Adjusting the throttle lever free play
Periodically check the throttle lever free play and
adjust if necessary.
TIP
The engine idling speed must be checked and ad-
justed before adjusting the throttle lever free play.
1. Slide the rubber cover away from the locknut.
2. Loosen the locknut.
3. To increase the throttle lever free play, turn
the throttle lever free play adjusting nut in di-
rection (a). To decrease the throttle lever free
play, turn the adjusting nut in direction (b).
4. Tighten the locknut.
5. Slide the rubber cover to its original position.
EBU24062
Valve clearance
The valve clearance changes with use, resulting in
improper air-fuel mixture and/or engine noise. To
prevent this from occurring, the valve clearance
must be adjusted by a Yamaha dealer at the inter-
vals specified in the periodic maintenance chart.
1. Rubber cover
2. Throttle lever free play adjusting nut
3. Locknut
4. Throttle lever free play
Throttle lever free play:
1.5–4.0 mm (0.06–0.16 in)
1
3
2
4
(b)
(a)
UBD315E0.book Page 21 Wednesday, January 15, 2020 1:18 PM