check engine light YAMAHA WR 450F 2007 Owners Manual

YAMAHA WR 450F 2007 Owners Manual WR 450F 2007 YAMAHA YAMAHA https://www.carmanualsonline.info/img/51/52481/w960_52481-0.png YAMAHA WR 450F 2007 Owners Manual

Page 226 of 794

YAMAHA WR 450F 2007  Owners Manual 3 - 14
INSP
ADJ
ENGINE OIL LEVEL INSPECTION
ENGINE OIL LEVEL INSPECTION
1. Stand the machine on a level surface.
NOTE:
When checking the oil level make sure that
the machine is upright.
Place the ma

Page 234 of 794

YAMAHA WR 450F 2007  Owners Manual 3 - 18
INSP
ADJ
IDLE SPEED ADJUSTMENT
9. Check:
Oil pressure
Checking steps:
Slightly loosen the oil gallery bolt 1.
Start the engine and keep it idling until oil
starts to seep from the oil galler

Page 288 of 794

YAMAHA WR 450F 2007  Owners Manual 3 - 44
INSP
ADJ
STEERING HEAD INSPECTION AND ADJUSTMENT
2. Inspect:
Bearing free play
Exist play → Replace.
STEERING HEAD INSPECTION AND 
ADJUSTMENT
1. Elevate the front wheel by placing a suit-
ab

Page 296 of 794

YAMAHA WR 450F 2007  Owners Manual 3 - 48
INSP
ADJ
ELECTRICAL/SPARK PLUG INSPECTION
EC370000
ELECTRICAL
EC371001
SPARK PLUG INSPECTION
1. Remove:
Spark plug
2. Inspect:
Electrode 1 
Wear/damage → Replace.
Insulator color 2 
Normal

Page 298 of 794

YAMAHA WR 450F 2007  Owners Manual 3 - 49
INSP
ADJ
IGNITION TIMING CHECK
IGNITION TIMING CHECK
1. Remove:
Timing plug 1 
1
2. Attach:
Timing light 
Inductive tachometer 
To the ignition coil lead (orange lead 1).
Timing light:
YM-33

Page 378 of 794

YAMAHA WR 450F 2007  Owners Manual 4 - 29
ENGCAMSHAFTS
Decompression system
1. Check:
Decompression system
Checking steps:
Check that the decompressor cam 1
moves smoothly.
Check that the decompressor lever pin 2
projects from the c

Page 516 of 794

YAMAHA WR 450F 2007  Owners Manual 4 - 98
ENGCRANKCASE AND CRANKSHAFT
REMOVAL POINTS
Crankcase
1. Separate:
Crankcase (right)
Crankcase (left)
Separation steps:
Remove the crankcase bolts, hose guide
and clutch cable holder.
NOTE:
L

Page 526 of 794

YAMAHA WR 450F 2007  Owners Manual 4 - 103
ENGCRANKCASE AND CRANKSHAFT
5. Install:
Dowel pin 1 
O-ring 2
Crankcase (right)
To crankcase (left).
NOTE:
Fit the crankcase (right) onto the crankcase
(left). Tap lightly on the case with

Page 748 of 794

YAMAHA WR 450F 2007  Owners Manual 7 - 2
TUN
CAUTION:
The carburetor is extremely sensitive to
foreign matter (dirt, sand, water, etc.).
During installation, do not allow foreign
matter to get into the carburetor.
Always handle the c