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Wheel (on Kz550-c) - Kawasaki KZ400 Service Manual

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*Gradually raise the vacuum (lower the pressure) applied
t o the vacuum switch valve, and check the valve opera-
When the vacuum i s l o w enough, the vacuum
switch valve should permit air t o flow.
When the
vacuum reaches a certain level between 4 0 and 46
cmHg, i t should stop air flow.
When the vacuum is
high enough, the air cannot also flow through the valve.
I f the vacuum switch valve does n o t operate a5 t h i s , re-
i t
with a new one. Adjustment i s n o t permitted.
NOTE: Whether the valve permits the air t o f l o w or
n o t is confirmed by blowing the air hose with breath.
Do not apply a vacuum more than 50
cmHg to the vacuum switch valve a s this
could damage the diaphragm in the valve.
gradually lower the vacuum (raise the
pressure) applied from the high vacuum, and check the
valve operation. The valve will return t o
i t s
state just the reverse way as i t came, b u t the transi-
tion should occur when the vacuum comes t o a level
and 46 cmHg. I f the valve does n o t work
as specified, replace the valve with a new one.
WHEEL (on KZ550-C)
Tubeless tires are installed on the wheels o f KZ550-C.
The main advantage o f the tubeless tires is an added
Tubeless Tire
1 . Air Vdlve
2. Rim
Rim Sealing Area
4. Bead Sealing Area
5. Bead Wires
7. Plies
8. Inner Liner
9. Side Wall
10. Tread
measure o f driving safety.
I n the event o f a puncture,
tubeless tires would n o t blow out but instead tend t o
lose air gradually. Another advantage is cooler running
The tire and rim form a leakproof unit by making
airtight contacts at the tire chafers and the rim flanges
instead o f using an inner tube.
The tires, rims, and air valves on this
motorcycle is designed only for tubeless
type wheels.
The recommended standard tires, rims,
and air valves must be used for replacement. For correct
performance, do not install a tube in a tubeless tire.
Structure o f the tubeless tire is characterized by
an inner liner and chafers.
The inner liner i s a layer o f thicker rubber which
covers the inside wall o f the tire.
The inner liner is
made from special quality o f rubber which is hard to
admit the air.
Generally chafers reinforce tire beads
which are likely damaged by friction with the rim.
The chafers o f tubeless tires have a characteristic o f
airtightness as well.
Since airtightness o f tubeless tires is accomplished
by closely seating the chafers i n good condition on the
rim, be careful not t o damage the chafers when handling
tubeless tires.
Tube Tire
I . Air Valve
2. Rim
3. Chafers
4. Bead Wires
5. Plies
6. Tube
7. Side Wdli
8. Tread


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