compression ratio YAMAHA YZF-R1 2012 Owners Manual

PERIODIC MAINTENANCE AND ADJUSTMENT
6-38
6
a jack either under each side of the
frame in front of the rear wheel or under
each side of the swingarm.
EAU25871
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 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 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 water heaters or furnaces. Gasoline or
gasoline vapors can ignite or ex-
plode, causing severe injury or
property damage.
U1KBE0E0.book Page 38 Monday, July 25, 2011 5:03 PM

SPECIFICATIONS
8-1
8
Dimensions:Overall length:2070 mm (81.5 in)
Overall width:
715 mm (28.1 in)
Overall height: 1130 mm (44.5 in)
Seat height: 835 mm (32.9 in)
Wheelbase:
1415 mm (55.7 in)
Ground clearance: 135 mm (5.31 in)
Minimum turning radius: 3500 mm (137.8 in)Weight:Curb weight:206 kg (454 lb)Engine:Engine type:
Liquid cooled 4-stroke, DOHC
Cylinder arrangement: Inline 4-cylinder
Displacement: 998 cm³
Bore × stroke:
78.0 × 52.2 mm (3.07 × 2.06 in)
Compression ratio: 12.70 : 1
Starting system: Electric starter
Lubrication system:
Wet sump
Engine oil:Recommended brand:YAMALUBE
Type:
SAE 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:3.73 L (3.94 US qt, 3.28 Imp.qt)
With oil filter cartridge replacement:
3.93 L (4.15 US qt, 3.46 Imp.qt)Cooling system:Coolant reservoir capacity (up to the
maximum level mark):0.25 L (0.26 US qt, 0.22 Imp.qt)
Radiator capacity (including all routes): 2.73 L (2.89 US qt, 2.40 Imp.qt)Air filter:Air filter element:Oil-coated paper element
Fuel:Recommended fuel:Premium unleaded gasoline only
Fuel tank capacity:
18.0 L (4.76 US gal, 3.96 Imp.gal)
Fuel reserve amount: 3.1 L (0.82 US gal, 0.68 Imp.gal)Fuel injection:Throttle body:
ID mark:1KB8 00Spark plug(s):Manufacturer/model: NGK/LMAR9E-J
Spark plug gap: 0.6–0.7 mm (0.024–0.028 in)Clutch:Clutch type:Wet, multiple-discTransmission:Primary reduction ratio:
1.512 (65/43)
Final drive: Chain
Secondary reduction ratio: 2.765 (47/17)
Transmission type:
Constant mesh 6-speed
Operation: Left foot operation
Gear ratio: 1st:2.533 (38/15)
–20 –10 0 1020 30 40 50 C
10 30 50 70 90 110
0 130 F
SAE 20W-50SAE 20W-40SAE 15W-40SAE 10W-40SAE 10W-50
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