compression ratio YAMAHA PW80 2011 Owners Manual

PERIODIC MAINTENANCE AND ADJUSTMENT
7-27
7
EAU25851
Troubleshooting Although Yamaha motorcycles receive
a thorough inspection before shipment
from the factory, trouble may occur dur-
ing operation. Any problem in the fuel,
compression, or ignition systems, for
example, can cause poor starting and
loss of power.
The following troubleshooting chart
represents a quick and easy procedure
for checking these vital systems your-
self. However, should your motorcycle
require any repair, take it to a Yamaha
dealer, whose skilled technicians have
the necessary tools, experience, and
know-how to service the motorcycle
properly.
Use only genuine Yamaha replace-
ment parts. Imitation parts may look like
Yamaha parts, but they are often inferi-
or, have a shorter service life and can
lead to expensive repair bills.
WARNING
EWA15141
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
property damage.U3RV8LE0.book Page 27 Tuesday, April 13, 2010 8:48 AM

SPECIFICATIONS
9-1
9
Dimensions:Overall length:
1540 mm (60.6 in)
Overall width:
640 mm (25.2 in)
Overall height:
880 mm (34.6 in)
Seat height:
635 mm (25.0 in)
Wheelbase:
1055 mm (41.5 in)
Ground clearance:
185 mm (7.28 in)
Minimum turning radius:
1700 mm (66.9 in)Weight:With oil and fuel:
61 kg (134 lb)Noise and vibration level:Noise level (77/311/EEC):
PW80 79.3 dB(A)@2750 r/min
Vibration on seat (EN1032, ISO5008):
PW80 Will not exceed 0.5 m/s²
Vibration on handlebar (EN1032, ISO5008):
PW80 Will not exceed 2.5 m/s²Engine:Engine type:
Air cooled 2-stroke
Cylinder arrangement:
Forward-inclined single cylinder
Displacement:
79 cm³
Bore × stroke:
47.0 × 45.6 mm (1.85 × 1.80 in)Compression ratio:
6.60 :1
Starting system:
Kickstarter
Lubrication system:
Separate lubrication (Yamaha autolube)
Engine oil:Type:
YAMALUBE 2S or 2-stroke engine oil
(JASO FC grade) or (ISO EG-C or EG-D
grade)
Engine oil quantity:
Quantity:
0.75 L (0.79 US qt, 0.66 Imp.qt)Transmission oil:Type:
YAMALUBE 4 (10W-40) or SAE 10W-40
Oil change quantity:
0.65 L (0.69 US qt, 0.57 Imp.qt)Air filter:Air filter element:
Wet elementFuel:Recommended fuel:
PW80 Regular unleaded gasoline only
PW80A Unleaded gasoline only
Fuel tank capacity:
4.9 L (1.29 US gal, 1.08 Imp.gal)
Fuel reserve amount:
1.0 L (0.26 US gal, 0.22 Imp.gal)Carburetor:Type × quantity:
VM15SC x 1
Spark plug(s):Manufacturer/model:
NGK/BPR6HS
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)Clutch:Clutch type:
Wet, multiple-disc automaticTransmission:Primary reduction system:
Helical gear
Primary reduction ratio:
66/21 (3.143)
Secondary reduction system:
Chain drive
Secondary reduction ratio:
32/15 (2.133)
Transmission type:
Constant mesh 3-speed
Operation:
Left foot operation
Gear ratio:
1st:
39/12 (3.250)
2nd:
29/16 (1.812)
3rd:
22/17 (1.294)Chassis:Frame type:
Steel tube backbone
Caster angle:
26.00 °
U3RV8LE0.book Page 1 Tuesday, April 13, 2010 8:48 AM