Honda CB900F Service Manual page 66

MAINTENANCE
Check the tubes between the fuel tank, EVAP canister,
EVA? purge control valve and throttle body for deteri-
oration, damage or loose connections. Also check that
the tubes are not kinked or pinched.
Refer to the Vacuum Hose Routing Diagram Label and
Cable & Harness Routing (page 1-271 for tube connec-
tions and routing .
Check the air suction hose between the air cleaner
housing and PAIR control solenoid valve for deterio-
ration, damage or loose connections.
Make sure that the hoses are not kinked, pinched or
cracked .
DRIVE CHAIN
DRIVE CHAIN SLACK INSPECTION
,
THROTILE BODY
PURGE TUBE
Never inspect and
adj us t the dri ve
chain while the
engine is fu nning.
3-16
Turn the ignition switch OFF, place the motorcycle on
its side stand and shift the transmission into neutral.
Check the slack in the drive chain lower run midway
between the sprockets.
CHAIN SLACK: 30 - 40 mm (1.2 - 1.6 in)
I
NOTICE
I
Excessive chain slack, 50 mm (2.0 in) or more, may
damage the frame.
ADJUSTMENT
Loosen the rear axle nut.
Turn both adjusting bolts until the correct drive chain
slack is obtained.
Make sure the index marks on both adjusting plate
are aligned with the end of the swingarm.
lighten the rear axle nut to the specified torque.
TORQUE: 93 Nom (9.5 kqf-rn, 69 Ibfoft)
Recheck the drive chain slack and free wheel rotation.
Lubricate the drive chain with #80 - 90 gear oil or
drive chain lubricant designed specifically for use
with O-ring chains. Wipe off the excess oil or chain
lubricant.
Check the drive chain wear indicator label attached on
the left drive chain adjusting plate.
If the swingarm index mark reaches the red zone of
the indicator label, replace the drive chain with a new
one (page 3-21).
30 - 40 mm (1.2 - 1.6 in)
ADJUSTING BOLT
RED ZONE
INDICATOR LABEL