2020 YAMAHA YFZ50 Valve

8-34
8
4. Pull the battery out of its compartment.
NOTICEECB00622Never attempt to open the battery or remove
the battery cell seals, as this would permanent-
ly damage the battery. To charge the battery

Confirm the recommended charging rate as
specified on the battery itself.
 Select a suitable charger and follow the manu-
facturer’s instructions.NOTICEECB00933To charge a VRLA (valve-regulated lead-acid)
battery, a special battery charger is required.
Using a conventional battery charger will dam-
age the battery. To store the battery
If the ATV will not be used for more than one
month, remove the battery, fully charge it, and
then place it in a cool, dry place.
 If the battery will be stored for more than two
months, check it at least once a month and fully
charge it if necessary.
NOTICEECB00942Always keep the battery charged. Storing the
battery in a discharged state for an extended
period of time will cause permanent battery
damage.
 Do not store the battery in an excessively
cold or warm place [below freezing or above
30 °C (90 °F)]. To install the battery
1. Place the battery in its compartment.
2. Connect the positive battery lead first, then connect the negative battery lead by installing
their bolt. NOTICE: When installing the bat-
tery, the main switch must be off, and the
positive lead must be connected before
the negative lead.
[ECB01111]
UBW463E0.book Page 34 Monday, January 28, 2019 10:22 AM

10-1
10
EBU25963
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:
125 mm (4.9 in)
Minimum turning radius: 2.3 m (7.55 ft)
Maximum water depth: 11 cm (4 in)Weight:Curb weight:100.0 kg (220 lb)Loading:Maximum loading limit:
41.0 kg (90 lb)
(Total weight of rider, cargo, accessories, and tongue)Noise and vibration level:Noise level (77/311/EEC):74.0 dB(A) at 3625 r/min Uncertainty of measurement:
0.3 dB(A)
Vibration on seat (EN1032, ISO5008): Will not exceed 0.5 m/s²
Uncertainty of measurement: 0.1 m/s²
Vibration on handle (EN1032, ISO5008):
4.6 m/s²
Uncertainty of measurement: 0.4 m/s²
Engine:Combustion cycle:
4-stroke
Cooling system: Air cooled
Valve train: SOHC
Number of cylinders:
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 sump
UBW463E0.book Page 1 Monday, January 28, 2019 10:22 AM

12-2
12
Part locations ................................................................. 3-1RRiding your ATV ............................................................. 7-1SSafety information .......................................................... 2-1
Seat .............................................................................. 4-13
Shock absorber, rear ...................................................4-13
Spark arrester, cleaning ............................................... 8-19
Spark plug, checking .....................................................8-9
Specifications ............................................................... 10-1
Speed limiter .................................................................. 4-3
Starter (choke) .............................................................. 4-12
Start switch .................................................................... 4-2
Steering shaft, lubricating ............................................ 8-32
Storage ........................................................................... 9-2TThrottle lever .......................................................... 4-3, 5-3
Throttle lever free play, adjusting ................................. 8-22
Tires ............................................................................... 5-3
Transmission oil ................................................... 5-3, 8-15
Troubleshooting ........................................................... 8-37
Troubleshooting chart .................................................. 8-38VValve clearance ............................................................ 8-22
Vehicle identification number ....................................... 11-1WWheel hub bearings, checking ..................................... 8-30
Wheel, installing ........................................................... 8-36
Wheel, removing .......................................................... 8-36YYamalube ..................................................................... 8-14UBW463E0.book Page 2 Monday, January 28, 2019 10:22 AM