Valve Clearance; Tires - Yamaha Y15ZR Owner's Manual

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,
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.
Periodic maintenance and adjustment
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Tires

Tires are the only contact between the
vehicle and the road. Safety in all con-
ditions of riding depends on a relatively
small area of road contact. Therefore, it
is essential to maintain the tires in good
condition at all times and replace them
at the appropriate time with the speci-
engine
fied tires.
Tire air pressure
The tire air pressure should be
checked and, if necessary, adjusted
before each ride.
WARNING
Operation of this vehicle with im-
proper tire pressure may cause se-
vere injury or death from loss of
control.
The tire air pressure must be
checked and adjusted on cold
tires (i.e., when the temperature
of the tires equals the ambient
temperature).
The tire air pressure must be
adjusted in accordance with the
riding speed and with the total
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weight of rider, passenger, car-
go, and accessories approved
for this model.
Tire air pressure (measured on cold
tires):
1 person:
Front:
Rear:
2 persons:
Front:
Rear:
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Maximum load*:
152 kg (335 lb)
* Total weight of rider, passenger,
cargo and accessories
WARNING
Never overload your vehicle. Opera-
tion of an overloaded vehicle could
cause an accident.
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