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8
5. Insert the dipstick completely into the oil filler
hole, and then remove it again to check the oil
level.
TIPThe engine oil should be between the minimum
and maximum level marks.
6. If the engine oil is at or below the minimumlevel mark, add sufficient oil of the recom-
mended type to raise it to the correct level.
NOTICE: Be sure the engine oil is at the
correct level, otherwise engine damage
may result.
[ECB00851]
7. Insert the dipstick completely into the oil filler hole.
8. Install the access cover by turning it clock- wise.
1. Engine oil dipstick
1. Maximum level mark
2. Minimum level mark
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8
2. Remove the final gear oil level check bolt and
its gasket, and then check the oil level in the
final gear case. The oil level should be at the
brim of the check hole.
3. If the oil is below the brim of the check hole, remove the final gear oil filler bolt and its gas-
ket, and then add sufficient oil of the recom-
mended type to raise it to the correct level. 4. Check the gaskets for damage, and replace
them if necessary.
5. Install the oil level check bolt, the oil filler bolt and their gasket, and then tighten the bolts to
the specified torques.
1. Final gear oil
2. Gasket
3. Final gear oil level check bolt
4. Correct oil level
1
243
1. Final gear oil filler bolt
2. GasketTightening torques:Final gear oil level check bolt:10 Nm (1.0 m·kgf, 7.2 ft·lbf)
Final gear oil filler bolt: 23 Nm (2.3 m·kgf, 17 ft·lbf)
1
2
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8-29
8
6. Check the oil level check bolt gasket and the
oil filler bolt gasket for damage, and replace
them if necessary.
7. Install the oil level check bolt, the oil filler bolt and their gasket, and then tighten the bolts to
the specified torques.
8. Check the final gear case for oil leakage. If oil is leaking, check for the cause.
EBU23426Differential gear oil The differential gear case must be checked for oil
leakage before each ride. If any leakage is found,
have a Yamaha dealer check and repair the ATV.
In addition, the differential gear oil level must be
checked and the oil changed as follows at the in-
tervals specified in the periodic maintenance and
lubrication chart. To check the differential gear oil level
1. Place the ATV on a level surface.
2. Remove the differential gear oil filler bolt and its gasket, and then check the oil level in the
differential gear case. The oil level should be
at the brim of the filler hole.
3. If the oil is below the brim of the filler hole, add sufficient oil of the recommended type to raise
it to the correct level.
4. Check the gasket for damage, and replace it if necessary.
Tightening torques:
Final gear oil level check bolt:10 Nm (1.0 m·kgf, 7.2 ft·lbf)
Final gear oil filler bolt: 23 Nm (2.3 m·kgf, 17 ft·lbf)
1. Differential gear oil filler bolt
2. Gasket
3. Differential gear oil
4. Correct oil level
1
2
3
4
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8-48
8Rear brake
WARNING
EWB02720Improper maintenance can result in loss of
braking ability. Observe these precautions:●Insufficient brake fluid may allow air to enter
the brake system, reducing braking perfor-
mance.●Clean the filler cap before removing. Use
only DOT 4 brake fluid from a sealed contain-
er.
●Use only the specified brake fluid; otherwise,
the rubber seals may deteriorate, causing
leakage.●Refill with the same type of brake fluid. Add-
ing a brake fluid other than DOT 4 may result
in a harmful chemical reaction.●Be careful that water does not enter the
brake fluid reservoir when refilling. Water
will significantly lower the boiling point of
the fluid and may result in vapor lock.NOTICEECB01160Brake fluid may damage painted surfaces or
plastic parts. Always clean up spilled fluid im-
mediately.As the brake pads wear, it is normal for the brake
fluid level to gradually go down. A low brake fluid
level may indicate worn brake pads and/or brake
system leakage; therefore, be sure to check the
brake pads for wear and the brake system for leak-
age. If the brake fluid level goes down suddenly,
have a Yamaha dealer check the cause before fur-
ther riding.
1. Minimum level markSpecified brake fluid:
DOT 4
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10-1
10
EBU25961
SPECIFICATIONS
Dimensions:Overall length:2065 mm (81.3 in)
Overall width: 1180 mm (46.5 in)
Overall height:
1240 mm (48.8 in)
Seat height: 905 mm (35.6 in)
Wheelbase: 1250 mm (49.2 in)
Ground clearance:
275 mm (10.8 in)
Minimum turning radius: 3200 mm (126 in)Weight:With oil and fuel:
294.0 kg (648 lb)Noise and vibration level:Noise level (77/311/EEC):YFM550DE 79.0 dB(A)@2950 r/min
YFM550PE 79.0 dB(A)@2950 r/min (EUR)(FRA)(GBR)
YFM550PHE 79.0 dB(A)@2950 r/min
YFM550PLE 79.0 dB(A)@2950 r/min Vibration on seat (EN1032, ISO5008):
YFM550DE Will not exceed 0.5 m/s²
YFM550PE Will not exceed 0.5 m/s² (EUR)(FRA)(GBR)
YFM550PHE Will not exceed 0.5 m/s²
YFM550PLE Will not exceed 0.5 m/s²
Vibration on handlebar (EN1032, ISO5008): YFM550DE Will not exceed 2.5 m/s²
YFM550PE Will not exceed 2.5 m/s² (EUR)(FRA)(GBR)
YFM550PHE Will not exceed 2.5 m/s²
YFM550PLE Will not exceed 2.5 m/s²
Engine:Engine type:
Liquid cooled 4-stroke, SOHC
Cylinder arrangement: Single cylinder
Displacement: 558 cm³
Bore × stroke:
92.0 × 84.0 mm (3.62 × 3.31 in)
Compression ratio: 9.30 : 1
Starting system: Electric starter
Lubrication system:
Wet sumpEngine oil:Recommended brand:YAMALUBE
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10-2
10
Type:SAE 5W-30, 10W-30, 10W-40, 15W-40, 20W-40 or 20W-
50
Recommended engine oil grade: API service SG type or higher, JASO standard MA
Engine oil quantity: Without oil filter cartridge replacement:
2.00 L (2.11 US qt, 1.76 Imp.qt)
With oil filter cartridge replacement: 2.10 L (2.22 US qt, 1.85 Imp.qt)Final gear oil:Type:
SAE 80 API GL-4 Hypoid gear oil
Quantity: 0.20 L (0.21 US qt, 0.18 Imp.qt)
Differential gear oil:Type:SAE 80 API GL-4 Hypoid gear oil
Quantity:
0.22 L (0.23 US qt, 0.19 Imp.qt)Cooling system:Coolant reservoir capacity (up to the maximum level mark):0.24 L (0.25 US qt, 0.21 Imp.qt)
Radiator capacity (including all routes):
1.99 L (2.10 US qt, 1.75 Imp.qt)Air filter:Air filter element:Wet elementFuel:Recommended fuel:YFM550DE Regular unleaded gasoline only
YFM550PE Regular unleaded gasoline only
(EUR)(FRA)(GBR)
YFM550PE Unleaded gasoline only (AUS)(NZL)
YFM550PHE Regular unleaded gasoline only
YFM550PLE Regular unleaded gasoline only
Fuel tank capacity:
20.0 L (5.28 US gal, 4.40 Imp.gal)
Fuel reserve amount: 4.5 L (1.19 US gal, 0.99 Imp.gal)Fuel injection:Throttle body:
ID mark:28P7 10
0 10 30 50 70 90 110 130 F
–20 –10 0 10 20 30 40 50 CSAE 5W-30
SAE 10W-30
SAE 10W-40
SAE 15W-40
SAE 20W-40SAE 20W-50
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10
Tire air pressure (measured on cold tires):Recommended:Front:35.0 kPa (0.350 kgf/cm², 5.0 psi)
Rear: 30.0 kPa (0.300 kgf/cm², 4.4 psi)
Minimum:
Front:32.0 kPa (0.320 kgf/cm², 4.6 psi)
Rear:
27.0 kPa (0.270 kgf/cm², 4.0 psi)Front wheel:Wheel type:Panel wheel
Rim size:
12 x 6.0ATRear wheel:Wheel type:Panel wheel
Rim size:
12 x 7.5ATFront brake:Type:Disc brake
Operation:
Right hand operation
Specified brake fluid: DOT 4Rear brake:Type:
Disc brake Operation:
Left hand and right foot operation
Specified brake fluid: DOT 4
Front suspension:Type:Double wishbone
Spring/shock absorber type: Coil spring/oil damper
Wheel travel:
180 mm (7.1 in)Rear suspension:Type:Double wishbone
Spring/shock absorber type:
Coil spring/gas-oil damper
Wheel travel: 230 mm (9.1 in)Electrical system:Ignition system:
TCI
Charging system: AC magnetoBattery:Model:
YTX20L-BS
Voltage, capacity: 12 V, 18.0 AhHeadlight:Bulb type:
Halogen bulb
U2LB60E0.book Page 4 Thursday, March 21, 2013 10:20 AM