Perio
d
ic maintenance an
d
a
d
justment
7-18
7
seate
d
in the air filter case. The
en
g
ine shoul
d
never
b
e operat-
e
d
without the air filter element
installe
d
, otherwise the pis-
ton(s) an
d
/or cylin
d
er(s) may
b
ecome excessively worn.
[ECA10482]
6. Install the air filter case cover by
installing the screws.
7. Install the seats.
To clean the air filter check hose
1. Remove the air filter check hose
under the air filter case.
2. Remove the hose, clean it, and
then install it in its original position.
EAU21386
Checkin
g
the throttle
g
rip free
play
Measure the throttle grip free play as
shown.
Periodically check the throttle grip free
play and, if necessary, have a Yamaha
dealer adjust it.
EAU21403
Valve clearance
The valves are an important engine
component, and since valve clearance
changes with use, they must be
checked and adjusted at the intervals
specified in the periodic maintenance
chart. Unadjusted valves can result in
improper air-fuel mixture, engine
noise, and eventually engine damage.
To prevent this from occurring, have
your Yamaha dealer check and adjust
the valve clearance at regular intervals.
TIP
This service must be performed when
the engine is cold.
1. Air filter check hose
1
1. Throttle grip free play
Throttle
g
rip free play:
3.0–5.0 mm (0.12–0.20 in)
1
UBHL10E0.book Page 18 Tuesday, October 5, 2021 9:57 AM
