2018 YAMAHA YFZ50 wheel

8-30
8Rear brake lever
EBU24964Checking the wheel hub bearingsThe front and rear wheel hub bearings must be
checked at the intervals specified in the periodic
maintenance and lubrication chart. If there is play
in a wheel hub or if a wheel does not turn smooth-
ly, have a Yamaha dealer check the wheel hub
bearings.
EBU36391Lubricating the front arm pivotsThe front arm pivots must be lubricated at the in-
tervals specified in the periodic maintenance and
lubrication chart.Recommended lubricant:
Lithium-soap-based grease
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8
EBU36413Replacing the fuseIf an electrical problem is suspected, check the
fuse and replace it if necessary as follows.NOTICEECB00641To prevent accidental short-circuiting, turn off
the main switch when checking or replacing a
fuse. 1. Turn off all electrical systems. (See page 4-1.)
2. Remove panel A. (See page 8-9.)3. Remove the blown fuse, and then install a
new fuse of the specified amperage.
WARNING! Always use a fuse of the spec- ified rating, and never use a substitute ob-
ject in place of the proper fuse. An
improper fuse or a substitute object can
cause damage to the electrical system,
which could lead to a fire.
[EWB02173]
4. Turn on the main switch and start the engine.
5. If the fuse immediately blows again, have a Yamaha dealer check the vehicle.EBU34030Removing a wheel1. Place the ATV on a level surface.
2. Loosen the wheel bolts.
1. Fuse
2. Spare fuse21
Specified fuse:7.5 A
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8-36
83. Elevate the ATV and place a suitable stand
under the frame.
4. Remove the bolts from the wheel.
5. Remove the wheel.
EBU34042Installing a wheel1. Install the wheel with the arrow mark pointing in the forward rotating direction of the wheel,
and then install the wheel bolts. 2. Lower the ATV to the ground.
3. Tighten the wheel bolts to the specified
torques.1. Wheel bolt
1
1
1. Arrow mark
2. Forward rotating direction
3. Wheel boltTightening torques:Front wheel bolt:45 N·m (4.5 kgf·m, 33 lb·ft)
Rear wheel bolt: 45 N·m (4.5 kgf·m, 33 lb·ft)3
1
2
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9
EBU25861
CLEANING AND STORAGE
EBU25903CleaningFrequent, 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 chain, sprockets or 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. Dry the chain and lubricate it to prevent it from rusting.
7. Clean the seat with a vinyl upholstery cleaner to keep the cover pliable and glossy.
8. Automotive type wax may be applied to all painted and chrome plated surfaces. Avoid
combination cleaner-waxes. Many contain
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9
e. Install the spark plug and the spark plug
cap.
6. Lubricate all control cables and the pivoting points of all levers.
7. Put the frame on stands or blocks to raise all wheels off the ground. (Alternatively, turn the
wheels each month to prevent the tires from
degrading in one spot.)
8. Cover the muffler outlet with a plastic bag to prevent moisture from entering it.
9. Remove the battery and fully charge it. (See page 8-32.)
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EBU25962
SPECIFICATIONS
Dimensions:Overall length:1250 mm (49.2 in)
Overall width: 820 mm (32.3 in)
Overall height:
770 mm (30.3 in)
Seat height: 585 mm (23.0 in)
Wheelbase: 830 mm (32.7 in)
Ground clearance:
88 mm (3.5 in)
Minimum turning radius: 2300 mm (91 in)Weight:Curb weight:
100.0 kg (220 lb)Noise and vibration level:Noise level (77/311/EEC):74.0 dB(A) (EUR, FRA, GBR)
Uncertainty of measurement:
2.0 dB(A) (EUR, FRA, GBR)
Vibration on seat (EN1032, ISO5008): Will not exceed 0.5 m/s² (EUR, FRA, GBR)
Uncertainty of measurement: 0.1 m/s² (EUR, FRA, GBR) Vibration on handle (EN1032, ISO5008):
4.7 m/s² (EUR, FRA, GBR)
Uncertainty of measurement: 0.4 m/s² (EUR, FRA, GBR)
Engine:Engine type:
Air cooled 4-stroke, SOHC
Cylinder arrangement: Single cylinder
Displacement: 49 cm³
Bore × stroke:
39.0 × 41.4 mm (1.54 × 1.63 in)
Compression ratio: 8.5 : 1
Starting system: Electric starter and kickstarter
Lubrication system:
Wet sumpEngine oil:Recommended brand:YAMALUBE
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Caster angle:1.10 °
Trail: 10.4 mm (0.41 in)Front tire:Type:Tubeless
Size: AT16 x 6.5-7
Manufacturer/model:
DURO/DI2040Rear tire:Type:Tubeless
Size:
AT16 x 7-7
Manufacturer/model: DURO/DI2041Loading:Maximum loading limit:
41.0 kg (90 lb)
(Total weight of rider, cargo, accessories, and tongue)Tire air pressure (measured on cold tires):Recommended:Front:
13.8 kPa (0.138 kgf/cm², 2.0 psi)
Rear: 13.8 kPa (0.138 kgf/cm², 2.0 psi)
Minimum: Front: 12.4 kPa (0.124 kgf/cm², 1.8 psi) Rear:
12.4 kPa (0.124 kgf/cm², 1.8 psi)
Front wheel:Wheel type:
Panel wheel
Rim size: 7 x 5.2ATRear wheel:Wheel type:
Panel wheel
Rim size: 7 x 5.2ATFront brake:Type:
Mechanical leading, trailing drum brake
Operation: Right hand operationRear brake:Type:
Mechanical leading, trailing drum brake
Operation: Left hand operationFront suspension:Type:
Swing axle
Spring/shock absorber type: Coil spring/oil damper
Wheel travel: 60 mm (2.4 in)
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Rear suspension:Type:Swingarm
Spring/shock absorber type:
Coil spring/oil damper
Wheel travel: 51 mm (2.0 in)Electrical system:Ignition system:
CDI
Charging system: AC magnetoBattery:Model:
GTX5L-BS
Voltage, capacity: 12 V, 4.0 AhFuse:Fuse:
7.5 AEBU30402For 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.UBW461E0.book Page 4 Tuesda
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