2016 YAMAHA YZ250F light

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Page 23 of 356

YAMAHA YZ250F 2016  Owners Manual IMPORTANT INFORMATION
1-9
EAS1SM9022GASKETS, OIL SEALS AND O-RINGS
1. When overhauling the engine, replace all 
gaskets and O-rings. All gasket surfaces, oil 
seal lips, and O-rings must be cleaned so

Page 29 of 356

YAMAHA YZ250F 2016  Owners Manual SPECIAL TOOLS
1-15
Pocket tester
90890-03112
Analog pocket tester
YU-03112-CThis tool is used to measure 
the voltage, current, and re-
sistance of electrical compo-
nents.
Timing light
90890-03141
YU

Page 34 of 356

YAMAHA YZ250F 2016  Owners Manual STARTING AND BREAK-IN
1-20
EAS1SM9039
STARTING AND BREAK-IN
EAS1SM9040FUEL
Always use the recommended fuel as stated 
below. Also, be sure to use new gasoline the 
day of a race.
ECA
NOTICE
Use only u

Page 39 of 356

YAMAHA YZ250F 2016  Owners Manual CLEANING AND STORAGE
1-25
EAS1SM9047
CLEANING AND STORAGE
EAS1SM9048CLEANING
Frequent cleaning of your vehicle will enhance 
its appearance, maintain performance, and ex-
tend the life of parts.
1. Be

Page 100 of 356

YAMAHA YZ250F 2016  Owners Manual ENGINE
3-16
7. Pour the specified amount of engine oil into 
the oil filler cap hole.
8. Install:
• Oil filler cap
9. Check:
• Oil level
Refer to “CHECKING THE ENGINE OIL 
LEVEL” on page 3-14.

Page 120 of 356

YAMAHA YZ250F 2016  Owners Manual ELECTRICAL SYSTEM
3-36
EAS1SM9112
ELECTRICAL SYSTEM
EAS1SM9113CHECKING THE SPARK PLUG
1. Remove:
• Seat
• Air scoop (left/right)
Refer to “GENERAL CHASSIS” on page 4-
1.
• Fuel tank “1”

Page 121 of 356

YAMAHA YZ250F 2016  Owners Manual ELECTRICAL SYSTEM
3-37
2. Attach:
• Timing light “1”
• Digital tachometer “2”
To the high tension code “3”.
3. Adjust:
• Engine idling speed
Refer to “ADJUSTING THE ENGINE 
IDLING

Page 158 of 356

YAMAHA YZ250F 2016  Owners Manual HANDLEBAR
4-34
3. Tighten:
• Lower handlebar holder nut4. Install:
• Handlebar grip “1”
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a. Slig
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