compression ratio YAMAHA YZF-R3 2015 Owners Manual

PERIODIC MAINTENANCE AND ADJUSTMENT
6-36
6
a jack either under each side of the
frame in front of the rear wheel or under
each side of the swingarm.
EAU25872
Trou
bleshootin gAlthough Yamaha motorcycles 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 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
inferior, have a shorter service life and
can lead to expensive repair bills.
WARNING
EWA15142
When checkin g the fuel system, d o
not smoke, an d make sure there are
no open flames or sparks in the ar-
ea, inclu din g pilot li ghts from water heaters or furnaces. Gasoline or
g
asoline vapors can i gnite or ex-
plo de, causin g severe injury or prop-
erty damag e.
UB02E0E0.book Page 36 Thursday, January 15, 2015 3:39 PM

SPECIFICATIONS
8-1
8
Dimensions:Overall length:2090 mm (82.3 in)
Overall width:
720 mm (28.3 in)
Overall height: 1135 mm (44.7 in)
Seat height: 780 mm (30.7 in)
Wheelbase:
1380 mm (54.3 in)
Ground clearance: 160 mm (6.30 in)
Minimum turning radius: 2700 mm (106.3 in)Wei ght:Curb weight:
169 kg (373 lb)Engine:Engine type:
Liquid cooled 4-stroke, DOHC
Cylinder arrangement: Inline 2-cylinder
Displacement: 321 cm3
Bore × stroke:
68.0 × 44.1 mm (2.68 × 1.74 in)
Compression ratio: 11.2 : 1
Starting system: Electric starter
Lubrication system:
Wet sump
Engine oil:Recommended brand:
YAMALUBE
Type:
SAE 10W-30, 10W-40, 10W-50, 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: 1.80 L (1.90 US qt, 1.58 Imp.qt)
With oil filter cartridge replacement:
2.10 L (2.22 US qt, 1.85 Imp.qt)Coolant quantity:Coolant reservoir (up to the maximum level
mark):0.25 L (0.26 US qt, 0.22 Imp.qt)
Radiator (including all routes): 0.96 L (1.01 US qt, 0.84 Imp.qt)Air filter:Air filter element:Oil-coated paper element
Fuel:Recommended fuel:Regular unleaded gasoline (Gasohol (E10)
acceptable)
Fuel tank capacity: 14 L (3.7 US gal, 3.08 Imp.gal)
Fuel reserve amount:
3.0 L (0.79 US gal, 0.66 Imp.gal)Fuel injection:Throttle body:ID mark: 2MS2 00Spark plu g(s):Manufacturer/model:
NGK/CR8E
Spark plug gap: 0.7–0.8 mm (0.028–0.031 in)Clutch:Clutch type:
Wet, multiple-discTransmission:Primary reduction ratio:3.043 (70/23)
Final drive:
Chain
Secondary reduction ratio: 3.071 (43/14)
Transmission type: Constant mesh 6-speed
Operation:
Left foot operation
Gear ratio: 1st:
2.500 (35/14)
–20 –10 0 1020 30 40 50 C
10 30 50 70 90 110
0 130 F
SAE 10W-30
SAE 15W-40SAE 20W-40SAE 20W-50
SAE 10W-40SAE 10W-50
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