2010 YAMAHA YZ250F radiator cap

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Page 15 of 196

YAMAHA YZ250F 2010  Owners Manual 1-5
DESCRIPTION
DESCRIPTION
• The machine you have purchased may differ slightly from those shown in the following.
• Designs and specifications are subject to change without notice.
1. Clutch lev

Page 19 of 196

YAMAHA YZ250F 2010  Owners Manual 1-9
SPECIAL TOOLS
Radiator cap tester
YU-24460-01, 90890-01325
Radiator cap tester adapter
YU-33984, 90890-01352These tools are used for checking 
the cooling system.
Steering nut wrench
YU-33975, 908

Page 34 of 196

YAMAHA YZ250F 2010  Owners Manual 2-8
MAINTENANCE SPECIFICATIONS
CHASSISLubrication system:
Oil filter type Paper type----
Oil pump type Trochoid type----
Tip clearance 0.12 mm or less (0.0047 in or less) 0.20 mm (0.008 
in)
Side clea

Page 36 of 196

YAMAHA YZ250F 2010  Owners Manual 2-10
TIGHTENING TORQUES
ELECTRICAL
TIGHTENING TORQUES
ENGINE
△- marked portion shall be checked for torque ti ghtening after break-in or before each race.
Item StandardLimit
Ignition system: Advance

Page 39 of 196

YAMAHA YZ250F 2010  Owners Manual 2-13
TIGHTENING TORQUES
△Front brake disc M6 × 1.0 6 12 1.2 8.7
△ Rear brake disc M6 × 1.0 6 14 1.4 10
△ Footrest bracket and frame M10 × 1.25 4 55 5.5 40
△ Brake pedal M8 × 1.25 1 26 2.6

Page 46 of 196

YAMAHA YZ250F 2010  Owners Manual 2-20
CABLE ROUTING DIAGRAM
1. Sub-wire harness
2. Hot starter cable
3. Oil hose
4. Neutral switch lead
5. Radiator hose 2
6. Clamp
7. Ignition coil lead
8. CDI magneto lead
9. Neutral switch lead coup

Page 47 of 196

YAMAHA YZ250F 2010  Owners Manual 2-21
CABLE ROUTING DIAGRAM
A. Pass the hot starter cable over the radiator mounting boss.
B. Pass the throttle position sensor  lead under the hot starter cable.
C. Fasten the throttle position sen- s

Page 53 of 196

YAMAHA YZ250F 2010  Owners Manual 3-3
MAINTENANCE INTERVALS
COOLING SYSTEMCheck coolant level and leakage ●●
Check radiator cap operation ●
Replace coolant ●Every two years
Inspect hoses ●
OUTSIDE NUTS AND BOLTS Retighten
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