compression ratio YAMAHA AEROX50 2014 Owners Manual

PERIODIC MAINTENANCE AND ADJUSTMENT
6-29
65. Insert a new bulb into the socket.
6. Install the socket (together with
the bulb) by pushing it in.
7. Install the cowling.
EAU25882
TroubleshootingAlthough Yamaha scooters receive a
thorough inspection before shipment
from the factory, trouble may occur
during operation. Any problem in the
fuel, compression, or ignition systems,
for example, can cause poor starting
and loss of power.
The following troubleshooting charts
represent quick and easy procedures
for checking these vital systems your-
self. However, should your scooter re-
quire any repair, take it to a Yamaha
dealer, whose skilled technicians have
the necessary tools, experience, and
know-how to service the scooter prop-
erly.
Use only genuine Yamaha replace-
ment parts. Imitation parts may look
like Yamaha parts, but they are often
inferior, have a shorter service life and
can lead to expensive repair bills.
WARNING
EWA15142
When checking the fuel system, do
not smoke, and make sure there are
no open flames or sparks in the ar-
ea, including pilot lights from waterheaters or furnaces. Gasoline or
gasoline vapors can ignite or ex-
plode, causing severe injury or prop-
erty damage.
1. Auxiliary light bulbU1GBE0E0.book Page 29 Wednesday, June 26, 2013 4:04 PM

SPECIFICATIONS
8-1
8
Dimensions:Overall length:1876 mm (73.9 in)
Overall width:
706 mm (27.8 in)
Overall height: 1154 mm (45.4 in)
Seat height: 817 mm (32.2 in)
Wheelbase:
1274 mm (50.2 in)
Ground clearance: 118 mm (4.65 in)
Minimum turning radius: 2000 mm (78.7 in)Weight:Curb weight:97 kg (214 lb)Engine:Engine type:
Liquid cooled 4-stroke, SOHC
Cylinder arrangement: Single cylinder
Displacement: 49 cm³
Bore × stroke:
38.0 × 43.5 mm (1.50 × 1.71 in)
Compression ratio: 12.00 : 1
Starting system: Electric starter and kickstarter
Lubrication system:
Wet sump
Engine oil:Type:SAE 10W-30, 10W-40, 20W-40 or 20W-50
Recommended engine oil grade: API service SG type or higher, JASO
standard MA
Engine oil quantity:
Periodic oil change:0.78 L (0.82 US qt, 0.69 Imp.qt)Final transmission oil:Type:SAE 10W-30 type SE motor oil
Quantity: 0.10 L (0.11 US qt, 0.09 Imp.qt)Cooling system:Coolant reservoir capacity (up to the
maximum level mark):
0.26 L (0.27 US qt, 0.23 Imp.qt)
Radiator capacity (including all routes): 0.52 L (0.55 US qt, 0.46 Imp.qt)
Air filter:Air filter element:Oil-coated paper elementFuel:Recommended fuel:Premium unleaded gasoline (Gasohol (E10)
acceptable)
Fuel tank capacity: 6.0 L (1.59 US gal, 1.32 Imp.gal)
Fuel reserve amount: 1.0 L (0.26 US gal, 0.22 Imp.gal)Fuel injection:Throttle body:ID mark:
3B31 00Spark plug(s):Manufacturer/model: NGK/CR7E
Spark plug gap:
0.7–0.8 mm (0.028–0.031 in)Clutch:Clutch type:Dry, centrifugal automaticTransmission:Primary reduction ratio:1
Final drive: Gear
Secondary reduction ratio:
52/13 × 44/12 (14.666)
Transmission type: V-belt automatic
Operation: Centrifugal automatic type
–20 –10 0 1020 30 40 50 C
10 30 50 70 90 110
0 130 F
SAE 20W-50SAE 20W-40
SAE 10W-40
SAE 10W-30
U1GBE0E0.book Page 1 Monday, July 15, 2013 11:45 AM