compression ratio YAMAHA YZ85 2022 Owners Manual

Instrument and control functions
4-11
4
EAU4133A
A djustin g the shock a bsor ber
assemb lyThis shock absorber assembly is
equipped with a spring preload adjust-
ing nut, a rebound damping force ad-
justing screw and a compression
damping force adjusting screw.NOTICE
ECA10102
To avoid d amag ing the mechanism,
d o not attempt to turn b eyond the
maximum or minimum settin gs.Sprin g preloa d
Adjust the spring preload as follows. 1. Loosen the clamp bolts, and then remove the air filter joint.
2. Loosen the locknut.
3. Turn the adjusting nut in direction(a) to increase the spring preload.
Turn the adjusting nut in direction
(b) to decrease the spring preload. 
A special wrench can be ob-
tained at a Yamaha dealer to
make this adjustment.
 The spring preload setting is
determined by measuring
distance A, shown in the illus-
tration. The longer distance A
is, the lower the spring pre-
load; the shorter distance A
is, the higher the spring pre-
load. With each complete
turn of the adjusting nut, dis-
tance A is changed by 1.5
mm (0.06 in).
1. Clamp bolt
2. Air filter joint
1. Clamp bolt
1 1
2 21 1 1
1. Locknut
2. Spring preload adjusting nut
1 2 1
(a) (a) (b) (b)
(a) (b)
2
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Periodic maintenance an d a djustment
7-29
7 4. Install the washer and axle nut.
5. Adjust the drive chain slack. (See
page 7-20.)
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.
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