compression ratio YAMAHA YZ85 2014 Owners Manual

PERIODIC MAINTENANCE AND ADJUSTMENT
7-31
75. Adjust the drive chain slack. (See
page 7-22.)
6. Tighten the locknuts and the axle nut to their specified torques.
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, do
not smoke, an d make sure there are
no open flames or sparks in the ar-
ea, inclu din g pilot lig hts from water heaters or furnaces. Gasoline or
g
asoline vapors can i gnite or ex-
plod e, causin g severe injury or prop-
erty damag e.
Tightenin g torque:
Locknut: 14 Nm (1.4 m·kgf, 10 ft·lbf)
Axle nut:
90 Nm (9.0 m·kgf, 65 ft·lbf)
U1SN82E0.book Page 31 Friday, June 7, 2013 3:51 PM

SPECIFICATIONS
9-1
9
Dimensions:Overall length:YZ85 1822 mm (71.7 in)
YZ85E 1822 mm (71.7 in)
YZ85LW 1900 mm (74.8 in)
YZ85LWE 1900 mm (74.8 in)
Overall width:
758 mm (29.8 in)
Overall height: YZ85 1161 mm (45.7 in)
YZ85E 1161 mm (45.7 in)
YZ85LW 1205 mm (47.4 in)
YZ85LWE 1205 mm (47.4 in)
Seat height: YZ85 864 mm (34.0 in)
YZ85E 864 mm (34.0 in)
YZ85LW 904 mm (35.6 in)
YZ85LWE 904 mm (35.6 in)
Wheelbase:
YZ85 1258 mm (49.5 in)
YZ85E 1258 mm (49.5 in)
YZ85LW 1286 mm (50.6 in)
YZ85LWE 1286 mm (50.6 in)
Ground clearance: YZ85 351 mm (13.82 in)
YZ85E 351 mm (13.82 in)
YZ85LW 393 mm (15.47 in)
YZ85LWE 393 mm (15.47 in)Wei ght:Curb weight:
YZ85 71 kg (157 lb)
YZ85E 71 kg (157 lb)
YZ85LW 73 kg (161 lb)
YZ85LWE 73 kg (161 lb)
Engine:Engine type:
Liquid cooled 2-stroke
Cylinder arrangement:
Single cylinder
Displacement: 84 cm³
Bore × stroke:
47.5 × 47.8 mm (1.87 × 1.88 in)
Compression ratio:
8.20 : 1
Starting system: Kickstarter
Lubrication system: PremixEngine oil:Type:
YAMALUBE 2RTransmission oil:Type:
YAMALUBE 4 (10W-40) or SAE 10W-40
Oil change quantity: 0.50 L (0.53 US qt, 0.44 Imp.qt)Coolin g system:Radiator capacity (including all routes):
0.54 L (0.57 US qt, 0.48 Imp.qt)Air filter:Air filter element:Wet elementFuel:Recommended fuel:Premium unleaded gasoline only
Fuel tank capacity: 5.0 L (1.32 US gal, 1.10 Imp.gal)
Car buretor:Type × quantity:
PWK28 x 1Spark plu g(s):Manufacturer/model:
NGK/BR10EG
Spark plug gap: 0.5–0.6 mm (0.020–0.024 in)Clutch:Clutch type:Wet, multiple-discTransmission:Primary reduction ratio:
3.611 (65/18)
Final drive: Chain
Secondary reduction ratio: YZ85 3.428 (48/14)
YZ85E 3.428 (48/14)
YZ85LW 3.714 (52/14)
YZ85LWE 3.714 (52/14)
Transmission type:
Constant mesh 6-speed
Operation: Left foot operation
Gear ratio: 1st:2.454 (27/11)
2nd: 1.882 (32/17)
3rd:
1.529 (26/17)
4th: 1.294 (22/17)
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