2009 YAMAHA WR 450F light

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Page 54 of 226

YAMAHA WR 450F 2009  Owners Manual 2-26
CABLE ROUTING DIAGRAM
1. Throttle cable
2. Clamp
3. Brake hose
4. Clutch cable
5. Hose guide
6. Main switch coupler
7. Wire harness
8. Headlight coupler
9. Hot starter cable
10. Multi-function di

Page 57 of 226

YAMAHA WR 450F 2009  Owners Manual 3-2
GENERAL MAINTENANCE AND LUBRICATION CHART
(For Canada)
GENERAL MAINTENANCE AND LUBRICATION CHART (For Canada)
No. ITEM CHECKS AND MAINTENANCE JOBSINITIALODOMETER 
READINGS600 mi 
(1,000 
km) or 1

Page 58 of 226

YAMAHA WR 450F 2009  Owners Manual 3-3
MAINTENANCE INTERVALS FOR COMPETITION USE
• The air filter needs more frequent service if you are riding in unusually wet or dusty areas.
• Hydraulic brake service
• After disassembling the

Page 63 of 226

YAMAHA WR 450F 2009  Owners Manual 3-8
ENGINE
ENGINE
REMOVING THE SEAT, FUEL TANK AND SIDE COVERS
Order Part name Qty Remarks
Turn the fuel cock to "OFF".
Disconnect the fuel hose.
1Seat 1
2 Air scoop (left and right) 2
3 Bolt (fuel t

Page 69 of 226

YAMAHA WR 450F 2009  Owners Manual 3-14
ENGINE
5. Inspect:
• Air filter element
Damage→Replace.
6. Apply:
• Foam-air-filter oil or equivalent oil 
to the element
• Squeeze out the excess oil. Ele-
ment should be wet but not dri

Page 70 of 226

YAMAHA WR 450F 2009  Owners Manual 3-15
ENGINE
5. Start the engine and let it warm up 
for several minutes.
When the oil tank is empty, never 
start the engine.
6. Idle the engine more than 10 sec-
onds while keeping the machine 
uprig

Page 71 of 226

YAMAHA WR 450F 2009  Owners Manual 3-16
ENGINE
ADJUSTING THE PILOT SCREW 
(For EUROPE)
1. Adjust:
• Pilot screw "1"
Adjustment steps:
To optimize the fuel flow at a smaller 
throttle opening, each machines pilot 
screw has been indi

Page 74 of 226

YAMAHA WR 450F 2009  Owners Manual 3-19
CHASSIS
CLEANING THE SPARK 
ARRESTER (For USA)
• Be sure the exhaust pipe and si-
lencer are cool before cleaning 
the spark arrester.
• Do not start the engine when 
cleaning the exhaust sys
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