2007 YAMAHA WR 250F bolt pattern

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Page 460 of 912

YAMAHA WR 250F 2007  Owners Manual 5 - 53
ENGCAMSHAFTS
REMOVAL POINTS
Camshaft
1. Remove:
Timing mark accessing screw
1 
Crankshaft end accessing
screw 
2 
2. Align:
T.D.C. mark
With align mark.
Checking steps:
Turn the crankshaft

Page 464 of 912

YAMAHA WR 250F 2007  Owners Manual 5 - 57
ENGCAMSHAFTS
4. Measure:
Camshaft-to-cap clearance 
Out of specification 
→ Mea-
sure camshaft outside diame-
ter. 
5. Measure: 
Camshaft outside diameter 
a 
Out of specification 
→ 
Rep

Page 534 of 912

YAMAHA WR 250F 2007  Owners Manual 5 - 127
ENGCLUTCH
8. Install:
Pressure plate 
1 
9. Install:
Clutch spring 
1 
Bolt (clutch spring) 
2 
NOTE:Tighten the bolts in stage, using a
crisscross pattern.
T R..10 Nm (1.0 m · kg, 7.2 ft

Page 548 of 912

YAMAHA WR 250F 2007  Owners Manual 5 - 141
ENGOIL FILTER ELEMENT, WATER PUMP AND RIGHT CRANKCASE COVER
Impeller shaft
1. Install:
Impeller shaft 
1 
Washer 
2 
Impeller 
3 
NOTE:Take care so that the oil seal lip is
not damaged or

Page 610 of 912

YAMAHA WR 250F 2007  Owners Manual 5 - 203
ENGAC MAGNETO AND STARTER CLUTCH
9. Install:
Washer (rotor)
Nut (rotor) 
1 
Use the sheave holder 
2.
NOTE:Tighten the rotor nut to 65 Nm
(6.5 mkg, 47 ftlb), loosen and
retighten the rotor

Page 676 of 912

YAMAHA WR 250F 2007  Owners Manual 6 - 13
CHASFRONT WHEEL AND REAR WHEEL
EC595000ASSEMBLY AND INSTALLATION
Front wheel
1. Install:
Bearing (left) 
1 
Spacer 
2 
Bearing (right) 
3 
Oil seal 
4 
NOTE:Apply the lithium soap base gre

Page 680 of 912

YAMAHA WR 250F 2007  Owners Manual 6 - 17
CHASFRONT WHEEL AND REAR WHEEL
Rear wheel
1. Install:
Bearing (right) 
1 
Circlip 
2 
Spacer 
3 
Bearing (left) 
4 
Oil seal 
5 
NOTE:Apply the lithium soap base grease
on the bearing and