2011 YAMAHA WR 450F oil

2-11
MAINTENANCE SPECIFICATIONS
Charging system:
System type AC magneto ----
Model (stator)/manufacturer 5TJ 50/YAMAHA ----
Normal output 14 V/120 W at 5,000 r/min ----
Charging coil resistance (color) 0.288–0.432 Ω at 20 °C (68 °F) (White–Ground) ----
Lighting coil resistance (color) 0.224–0.336 Ω at 20 °C (68 °F) (Yellow–Ground) ----
Rectifier/regulator:
Regulator type Semiconductor short circuit ----
Model/manufacturer SH770AA/SHINDENGEN ----
Regulated voltage (AC) 12.5–13.5 V ----
Regulated voltage (DC) 14.0–15.0 V ----
Rectifier capacity (AC) 12 A ----
Rectifier capacity (DC) 8 A ----
Electric starting system:
Type Constant mesh ----
Starter motor:
Model/manufacturer 5UM20/YAMAHA ----
Operation voltage 12 V ----
Output 0.48 kW ----
Armature coil resistance 0.0117–0.0143 Ω at 20 °C (68 °F) ----
Brush overall length 7 mm (0.28 in) 3.5 mm (0.14
in)
Brush quantity 2 pcs. ----
Spring force 3.92–5.88 N (400–600 g, 14.1–21.2 oz) ----
Commutator diameter 17.6 mm (0.69 in) 16.6 mm (0.65
in)
Mica undercut (depth) 1.5 mm (0.06 in) ----
Starter relay:
Model/manufacturerRC19-042/MITSUBA ----
Amperage rating 180 A ----
Coil winding resistance 4.2–4.6 Ω at 20 °C (68 °F) ----
Starting circuit cut-off relay:
Model/manufacturer ACM33221 M38/MATSUSHITA ----
Coil winding resistance 75.69–92.51 Ω at 20 °C (68 °F) ----
Fuse (amperage×quantity):
Main fuse 10 A × 1 ----
Reserve fuse 10 A × 1 ----Item Standard Limit

2-13
TIGHTENING TORQUES
Radiator pipe 1, 2 M10 × 1.0 2 10 1.0 7.2
Impeller M8 × 1.25 1 14 1.4 10
Water pump housing cover M6 × 1.0 3 10 1.0 7.2
Coolant drain bolt M6 × 1.0 1 10 1.0 7.2
Oil pump cover M4 × 0.7 1 2 0.2 1.4
Oil pump M6 × 1.0 2 10 1.0 7.2
Oil pump drive gear shaft M6 × 1.0 1 10 1.0 7.2
Engine oil drain bolt (oil filter) M6 × 1.0 1 10 1.0 7.2
Oil filter cover M6 × 1.0 2 10 1.0 7.2
Oil check bolt (cylinder head) M6 × 1.0 1 10 1.0 7.2
△Oil hose clamp — 2 2 0.2 1.4
Crankshaft end accessing screw M27 × 1.5 1 10 1.0 7.2
Timing mark accessing screw M14 × 1.5 1 6 0.6 4.3
Clutch cover M6 × 1.0 7 10 1.0 7.2
Crankcase cover (right) M6 × 1.0 8 10 1.0 7.2
Crankcase cover (right) M6 × 1.0 2 12 1.2 8.7
Crankcase cover (left) M6 × 1.0 8 10 1.0 7.2
Idle gear cover (starter motor) M6 × 1.0 2 10 1.0 7.2
Crankcase M6 × 1.0 12 12 1.2 8.7
Clutch cable holder M6 × 1.0 1 10 1.0 7.2
Oil drain bolt (crankcase right) M6 × 1.25 1 20 2.0 14
Oil drain bolt (crankcase left) M6 × 1.0 1 20 2.0 14
Oil check bolt (crankcase) M6 × 1.0 1 10 1.0 7.2
Oil strainer M6 × 1.0 1 10 1.0 7.2
Crankcase bearing stopper M6 × 1.0 4 14 1.4 10
Crankcase bearing stopper M6 × 1.0 8 10 1.0 7.2
Drive axle oil seal stopper M6 × 1.0 2 10 1.0 7.2
Ratchet wheel guide M6 × 1.0 2 12 1.2 8.7
Kickstarter crank M8 × 1.25 1 33 3.3 24
Screw (kickstarter crank) M6 × 1.0 1 7 0.7 5.1
Starter clutch M6 × 1.0 6 16 1.6 11
Primary drive gear M20 × 1.0 1 110 11.0 80
Clutch boss M20 × 1.0 1 75 7.5 54
Clutch cable adjust bolt and locknut M8 × 1.0 1 4 0.4 2.9
Clutch spring M6 × 1.0 6 10 1.0 7.2
Balancer M10 × 1.0 1 45 4.5 32
Balancer driven gear M14 × 1.0 1 50 5.0 36
Balancer weight plate M6 × 1.0 3 10 1.0 7.2
Drive sprocket M20 × 1.0 1 75 7.5 54
Drive chain sprocket cover M6 × 1.0 2 7 0.7 5.1
Shift pedal M6 × 1.0 1 12 1.2 8.7
Shift guide M6 × 1.0 2 10 1.0 7.2
Stopper lever M6 × 1.0 1 10 1.0 7.2
Segment M8 × 1.25 1 30 3.0 22Part to be tightened Thread size Q'tyTightening torque
Nm m•kg ft•lb

2-16
TIGHTENING TORQUES
1. First, tighten the steering ring nut approximately 38 Nm (3.8 m•kg, 27 ft•lb) by using the steering nut wrench, then loosen
the steering ring nut one turn.
2. Retighten the steering ring nut 7 Nm (0.7 m•kg, 5.1 ft•lb).
ELECTRICAL
Tighten the rotor nut to 65 Nm (6.5 m•kg, 47 ft•lb), loosen and retighten the rotor nut to 65 Nm (6.5 m •kg, 47 ft•lb).
△Headlight mounting (left and right) M6 × 1.0 2 7 0.7 5.1
Taillight mounting — 3 1 0.1 0.7
Taillight lead clamp and rear fender — 3 0.5 0.05 0.36
△Catch tank (upper) M6 × 1.0 1 16 1.6 11
△Catch tank (lower) M6 × 1.0 1 7 0.7 5.1
△Footrest bracket and frame M10 × 1.25 4 55 5.5 40
Sidestand mounting M10 × 1.25 1 25 2.5 18
Front reflector (For CDN) M6 × 1.0 2 4 0.4 2.9
Rear reflector (For CDN) M5 × 0.8 3 2 0.2 1.4Part to be tightened Thread size Q'tyTightening torque
Nm m•kg ft•lb
Part to be tightened Thread size Q'tyTightening torque
Nm m•kg ft•lb
Stator M5 × 0.8 2 7 0.7 5.1
Holder (AC magneto lead) M5× 0.8 2 10 1.0 7.2
Rotor M12 × 1.25 1 Refer to TIP.
Neutral switch M5 × 0.8 2 4 0.4 2.9
Starter motor M6 × 1.0 2 10 1.0 7.2
Starter relay terminal M6 × 1.0 2 4 0.4 2.9
Pickup coil M6 × 1.0 2 10 1.0 7.2

2-19
LUBRICATION DIAGRAMS
LUBRICATION DIAGRAMS
1. Oil filter element
2. Oil pump
3. Drive axle
4. Main axle
5. Crankshaft
6. Connecting rod
A. From cylinder
B. To oil tank

2-20
LUBRICATION DIAGRAMS
1. Intake camshaft
2. Exhaust camshaft
A. To main axle
B. From oil pump

2-23
CABLE ROUTING DIAGRAM
1. Throttle cable (pull)
2. Throttle cable (return)
3. Catch tank hose
4. Ignition coil
5. Clamp
6. Air induction hose (air cut-off
valve - rear of cylinder head)
7. Catch tank breather hoseA. Cross the pull and push throttle
cables.
B. Fasten the catch tank hose and
air induction hose (air cut-off
valve-rear of cylinder head) onto
the frame. Locate the clamp end
facing toward the lower side of
the frame and cut off the tie end.
C. Fasten the catch tank breather
hose and carburetor breather
hoses together.D. Pass the carburetor breather
hose (of the throttle cable cover)
through the hose holder.

3-1
PERIODIC MAINTENANCE CHART FOR THE EMISSIONCONTROL SYSTEM (For Canada)
REGULAR INSPECTION AND ADJUSTMENTS
PERIODIC MAINTENANCE CHART FO R THE EMISSION CONTROL SYSTEM (For Canada)
• From 4,200 mi (7,000 km) or 9 months, repeat the maintenanc e intervals starting from 1,800 mi (3,000 km) or 3 months.
• Items marked with an asterisk should be performed by a Yam aha dealer as they require special tools, data and technical
skills.
No. ITEM CHECKS AND MAINTENANCE JOBS INITIAL
ODOMETER
READINGS600 mi (1,000
km) or 1 month 1,800 mi
(3,000
km) or 3 months 3,000 mi
(5,000
km) or 6 months
1 * Fuel line Check fuel hoses for cracks or damage.
√√√
Replace if necessary.
2 Spark plug Check condition.
√√√
Adjust gap and clean.
3 * Valve clearance Check and adjust valve clearance when en-
gine is cold.
√√√
4 * Air filter element Clean with solvent and apply foam air-filter oil
or equivalent oil.
√√√
Replace if necessary.
5 * Breather system Check ventilation hose for cracks or damage
and drain any deposits.
√√√
Replace if necessary.
6 * Carburetor Check engine idling speed and starter opera-
tion.
√√√
Adjust if necessary.
7 Exhaust system Check for leakage.
√√√
Tighten if necessary.
Replace gasket(s) if necessary.
8 Engine oil Change (warm engine before draining). √√√
9 Engine oil filter element Replace. √√√
10 * Air induction system Check the hose for damage.
√√
Replace any damaged parts if necessary.

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 brake master cylinders and calipers, always change the fluid. Regularly check the brake fluid
levels and fill the reservoirs as required.
• Every two years replace the internal components of the brake master cylinders and calipers, and change the brake fluid.
• Replace the brake hoses every four years and if cracked or damaged.
MAINTENANCE INTERVALS FOR COMPETITION USE
• The following schedule is intended as a general guide to maintenance and lubrication. Bear in mind that such factors as
weather, terrain, geographical location, and individual usage will alter the required maintenance and lubrication intervals.
If you are a doubt as to what intervals to follow in maintaining and lubricating your machine, consult your Yamaha dealer.
• Periodic inspection is essential in making full use of the machine performance. The service life of the parts varies sub-
stantially according to the environment in which the machine runs (e.g., rain, dirt, etc.). Therefore, earlier inspection is
required by reference to the list below.
15 Sidestand pivotCheck operation.
√√√
Apply lithium-soap-based grease (all-purpose
grease) lightly.
16 * Front forkCheck operation and for oil leakage.
√√
Replace if necessary.
17 * Shock absorber assemblyCheck operation and for oil leakage.
√√
Replace if necessary.
18 * Rear suspension link pivots Apply molybdenum disulfide grease lightly.√√
19 * Control cablesApply Yamaha chain and cable lube or engine
oil 10W-30 thoroughly.√√√
20 * Throttle grip housing and cableCheck operation and free play.
√√√ Adjust the throttle cable free play if necessary.
Lubricate the throttle grip housing and cable.
21 * Chassis fastenersCheck all chassis fitting and fasteners.
√√√
Correct if necessary.
22 Battery Check terminal for looseness and corrosion.√√ No. ITEM CHECKS AND MAINTENANCE JOBSINITIALODOMETER
READINGS
600 mi
(1,000
km) or 1
month1,800 mi
(3,000
km) or 3
months3,000 mi
(5,000
km) or 6
months
ItemAfter
break-
inEvery
race
Every
third
(or 500
km)Every
fifth (or
1,000
km)
As re-
quiredRemarks
ENGINE OIL
Replace●●
VALVES
Check the valve clearances●●The engine must be cold.
Inspect●Check the valve seats and valve
stems for wear.
Replace●
VALVE SPRINGS
Inspect●Check the free length and the tilt.
Replace●