Perio
d
ic maintenance an
d
a
d
justment
6-15
6
EAU60451
Replacin
g
the air filter ele-
ment an
d
cleanin
g
the check
hose
The air filter element should be re-
placed at the intervals specified in the
periodic maintenance and lubrication
chart. Have a Yamaha dealer replace
the air filter element more frequently if
you are riding in unusually wet or dusty
areas. However, the air filter check
hose can be easily reached and should
be frequently checked and cleaned if
necessary.
To clean the air filter check hose
1. Remove the air filter check hose
under the air filter case.
2. Clean and then install the hose.
EAU44735
Checkin
g
the en
g
ine i
d
lin
g
spee
d
Check the engine idling speed and, if
necessary, have it corrected by a
Yamaha dealer.
1. Air filter check hose
111
En
g
ine i
d
lin
g
spee
d
:
1250–1450 r/min
Summary of Contents for MTN690-U
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