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Yamaha YP250 Service Manual

Yamaha YP250
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5-8
3mm
95_C82”1.5_C
THERMOSTAT
COOL
*****************************************************
*****************************************************
NOTE:
EB502010
INSPECTION
1. Inspect:
D Thermostatic valve
Valve does not open at 80.5 83.5_C
Replace.
Inspection steps:
D Suspend the thermostatic valve in a vessel.
D Place a reliable thermometer in water.
D Observe the thermometer, while continually
stirring the water.
1
Thermostatic valve
2
Vessel
3
Thermometer
4
Water
A
CLOSE
B
OPEN
The thermostatic valve is sealed and its setting
requires specialized work. If its accuracy is in
doubt, replace it. A faulty unit could cause seri-
ous overheating or over-cooling.
2. Inspect:
D Thermostatic cover
Cracks/damage Replace.
YP******
INSTALLATION
1. Install:
D Thermostatic valve
1
D Thermostatic cover

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Questions and Answers:

Yamaha YP250 Specifications

General IconGeneral
Fuel SystemFuel Injection
Ignition SystemTCI
TransmissionV-Belt Automatic
Front SuspensionTelescopic Fork
Rear SuspensionUnit Swing
Front Tyre120/70-14
Wheelbase1, 540 mm
Ground Clearance140 mm
EngineLiquid-cooled, 4-stroke, SOHC, 4-valve
Front BrakeHydraulic Single Disc
Rear BrakeHydraulic Single Disc
Rear Tyre140/

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