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Yamaha UMX - Checking the Body and Chassis; Checking the Fasteners; Checking the Reverse Buzzer

Yamaha UMX
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PRE-OPERATION CHECKS
3-7
Front
250 kPa (2.5 kgf/cm²) (36 psi)
Rear
250 kPa (2.5 kgf/cm²) (36 psi)
Higher pressures and fast inflation may
cause a tire to burst. Inflate the tires very
slowly and carefully.
1. Measure:
Tire pressure
Out of specification Adjust.
WARNING
Uneven or improper tire pressure may ad-
versely affect the handling of this vehicle
and may cause loss of control.
Maintain proper tire pressures.
Set tire pressures when the tires are cold.
Tire pressures must be equal in both front
tires and equal in both rear tires.
2. Check:
Tire surfaces
Wear/damage Replace.
WARNING
It is dangerous to ride with a worn-out tire.
When the tire tread reaches the wear limit, re-
place the tire immediately.
CHECKING THE BODY AND CHASSIS
1. Check:
Body
Chassis
Cracks/damage Replace.
CHECKING THE FASTENERS
1. Check:
Fasteners
Loosen Tighten.
Damage/pitting Replace.
Refer to “GENERAL CHASSIS (1)” on page
4-1, “GENERAL CHASSIS (2)” on page 4-3
and “GENERAL CHASSIS (3)” on page 4-6.
CHECKING THE REVERSE BUZZER
1. Check:
Reverse buzzer operation
Dose not sound Repair or replace.
Refer to “CHECKING THE REVERSE
BUZZER” on page 8-57 or “CHECKING THE
REVERSE BUZZER” on page 8-78.
Tire air pressure (measured on
cold tires)
Recommended
Front
137 kPa (1.37 kgf/cm², 20 psi)
Rear
151 kPa (1.51 kgf/cm², 22 psi)
Minimum
Front
124 kPa (1.24 kgf/cm², 18 psi)
Rear
137 kPa (1.37 kgf/cm², 20 psi)
(YUM1A)
151 kPa (1.51 kgf/cm², 22 psi)
(YUM2A/YUM2E)
Wear limit
1.0 mm (0.04 in)
a. Wear limit
a

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