Page 161 of 174

9-1
9
EBU25861
CLEANING AND STORAGE
EBU25882CleaningFrequent, thorough cleaning of your ATV will not
only enhance its appearance but will improve its
general performance and extend the useful life of
many components.1. Before cleaning the ATV: a. Block off the end of the exhaust pipe toprevent water entry. A plastic bag and
strong rubber band may be used.
b. Make sure the spark plug and all filler caps are properly installed.
2. If the engine case is excessively greasy, apply degreaser with a paint brush. Do not apply
degreaser to the wheel axles.
3. Rinse the dirt and degreaser off with a garden hose. Use only enough pressure to do the
job. WARNING! Wet brakes may have re-
duced stopping ability, increasing the
chance of an accident. Test the brakes af-
ter washing. Apply the brakes several
times at slow speeds to let friction dry out
the linings.
[EWB02312]
NOTICE: Excessive wa-
ter pressure may cause water seepage and deterioration of wheel bearings,
brakes, transmission seals and electrical
devices. Many expensive repair bills have
resulted from improper high-pressure de-
tergent applications such as those avail-
able in coin-operated car washers.
[ECB00712]
4. Once most of the dirt has been hosed off,
wash all surfaces with warm water and mild,
detergent-type soap. An old toothbrush or
bottle brush is handy for hard-to-reach pla-
ces.
5. Rinse the ATV off immediately with clean wa- ter and dry all surfaces with a chamois, clean
towel or soft absorbing cloth.
6. Clean the seat with a vinyl upholstery cleaner to keep the cover pliable and glossy.
7. Automotive type wax may be applied to all painted and chrome plated surfaces. Avoid
combination cleaner-waxes. Many contain
abrasives which may mar the paint or protec-
tive finish. When finished cleaning, start the
engine and let it idle for several minutes.
U2LB61E0.book Page 1 Friday, February 21, 2014 3:03 PM
Page 162 of 174

9-2
9
EBU27262StorageShort-term
Always store your ATV in a cool, dry place and, if
necessary, protect it against dust with a porous
cover. NOTICE: Storing the ATV in a poorly ven-
tilated room or covering it with a tarp while it is
still wet, will allow water and humidity to seep
in and cause rust. To prevent corrosion, avoid
damp cellars, stables (because of the presence
of ammonia) and areas where strong chemi-
cals are stored.
[ECB00722]
Long-term
Before storing your ATV for several months: 1. Follow all the instructions in the “Cleaning” section of this chapter.
2. Fill up the fuel tank and add fuel stabilizer (if available) to prevent the fuel from deteriorat-
ing. 3. Perform the following steps to protect the cyl-
inder, piston rings, etc. from corrosion.a. Remove the spark plug cap and spark plug.
b. Pour a teaspoonful of engine oil into the spark plug bore.
c. Install the spark plug cap onto the spark plug, and then place the spark plug on the
cylinder head so that the electrodes are
grounded. (This will limit sparking during
the next step.)
d. Turn the engine over several times with the starter. (This will coat the cylinder wall
with oil.)
e. Remove the spark plug cap from the spark plug, and then install the spark plug and
the spark plug cap.
4. Lubricate all control cables and the pivoting points of all levers and pedals.
5. Check and, if necessary, correct the tire air pressure, and then block up the ATV so that
all of its wheels are off the ground. Alterna-
tively, turn the wheels a little every month in
order to prevent the tires from becoming de-
graded in one spot.
Specified amount:
7.5 ml of stabilizer to each liter of fuel (or 1
oz of stabilizer to each gallon of fuel)U2LB61E0.book Page 2 Friday, February 21, 2014 3:03 PM
Page 163 of 174
9-3
9
6. Cover the muffler outlet with a plastic bag to
prevent moisture from entering it.
7. Remove the battery and fully charge it. Store it in a cool, dry place and charge it once a
month. Do not store the battery in an exces-
sively cold or warm place [less than 0 °C (30
°F) or more than 30 °C (90 °F)]. For more infor-
mation on storing the battery, see page 8-55.
TIPMake any necessary repairs before storing the
ATV. U2LB61E0.book Page 3 Friday, February 21, 2014 3:03 PM
Page 164 of 174

10-1
10
EBU25962
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:Curb weight:
294.0 kg (648 lb)Noise and vibration level:Noise level (77/311/EEC):YFM550DF 79.0 dB(A)@2950 r/min (EUR)(FRA)(GBR)
YFM550PF 79.0 dB(A)@2950 r/min (EUR)(FRA)(GBR)
YFM550PHF 79.0 dB(A)@2950 r/min
Vibration on seat (EN1032, ISO5008): YFM550DF Will not exceed 0.5 m/s² (EUR)(FRA)(GBR)
YFM550PF Will not exceed 0.5 m/s² (EUR)(FRA)(GBR)
YFM550PHF Will not exceed 0.5 m/s² Vibration on handle (EN1032, ISO5008):
YFM550DF Will not exceed 2.5 m/s² (EUR)(FRA)(GBR)
YFM550PF Will not exceed 2.5 m/s² (EUR)(FRA)(GBR)
YFM550PHF 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: 9.3 : 1
Starting system: Electric starter
Lubrication system:
Wet sumpEngine oil:Recommended brand:YAMALUBE
U2LB61E0.book Page 1 Friday, February 21, 2014 3:03 PM
Page 165 of 174

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: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 10Spark plug (s):Manufacturer/model:NGK/LMAR6A-9
Spark plug gap: 0.8–0.9 mm (0.031–0.035 in)Clutch:Clutch type:Wet, centrifugal automatic
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
U2LB61E0.book Page 2 Friday, February 21, 2014 3:03 PM
Page 166 of 174

10-3
10
Transmission:Primary reduction system:V-belt
Secondary reduction system:
Shaft drive
Secondary reduction ratio: 41/21 × 24/18 × 33/9 (9.544)
Transmission type: V-belt automatic
Operation:
Left hand operation
Reverse gear: 23/14 × 28/23 (2.000)
Low range: 31/16 (1.938)
High range:
31/27 (1.148)Chassis:Frame type:Steel tube frame
Caster angle:
5.0 °
Trail: 26.0 mm (1.02 in)Front tire:Type:
Tubeless
Size: AT25 x 8-12 Manufacturer/model:
YFM550DF CHENG SHIN/C828 (AUS)(NZL)
YFM550DF MAXXIS/MU19 (EUR)(FRA)(GBR)
YFM550PF CHENG SHIN/C828 (AUS)(NZL)
YFM550PF MAXXIS/MU19 (EUR)(FRA)(GBR)
YFM550PHF MAXXIS/MU19
Rear tire:Type:Tubeless
Size:
AT25 x 10-12
Manufacturer/model: YFM550DF CHENG SHIN/C828 (AUS)(NZL)
YFM550DF MAXXIS/MU20 (EUR)(FRA)(GBR)
YFM550PF CHENG SHIN/C828 (AUS)(NZL)
YFM550PF MAXXIS/MU20 (EUR)(FRA)(GBR)
YFM550PHF MAXXIS/MU20Loading:Maximum loading limit:220.0 kg (485 lb)
(Total weight of rider, cargo, accessories, and tongue)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)
U2LB61E0.book Page 3 Friday, February 21, 2014 3:03 PM
Page 167 of 174
10-4
10
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 4Front 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 bulbBulb voltage, wattage × quantity:Headlight:
12 V, 35.0/35.0 W × 2
Tail/brake light:
12 V, 5.0/21.0 W × 1
Meter lighting: EL (Electroluminescent)
Neutral indicator light: LED
Reverse indicator light:
LED
U2LB61E0.book Page 4 Friday, February 21, 2014 3:03 PM
Page 168 of 174

10-5
10
Coolant temperature warning light:LED
EPS warning light: YFM550PF LED
YFM550PHF LED
Park indicator light: LED
On-Command four-wheel-drive/differential gear lock
indicator: LCD
Engine trouble warning light:
LED
High-range indicator light: LED
Low-range indicator light: LED
Differential gear lock indicator light:
LEDFuses:Main fuse:40.0 A
Fuel injection system fuse:
15.0 A
EPS fuse: YFM550PF 40.0 A
YFM550PHF 40.0 A
Headlight fuse: 10.0 A
Signaling system fuse: 5.0 A
Ignition fuse:
10.0 A Auxiliary DC jack fuse:
10.0 A
Four-wheel-drive motor fuse: 10.0 A
Radiator fan motor fuse:
20.0 A
EBU30402For Europe only
The figures quoted are emission levels and are not
necessarily safe working levels. Whilst there is a
correlation between the emission and exposure
levels, this cannot be used reliably to determine
whether or not further precautions are required.
Factors that influence the actual level of exposure
of work-force include the characteristics of the
work room, the other sources of noise, etc. i.e. the
number of machines and other adjacent process-
es, and the length of time for which an operator is
exposed to the noise. Also the permissible expo-
sure level can vary from country. This information,
however, will enable the user of the machine to
make a better evaluation of the hazard and risk.
U2LB61E0.book Page 5 Friday, February 21, 2014 3:03 PM