YAMAHA WOLVERINE 2015 Repair Manual

4-23
4
TIPAlthough the total number of clicks or turns of
a damping force adjusting mechanism may
not exactly match the following specifications
due to small differences in production, the ac-
tual number of clicks or turns always repre-
sents the entire adjusting range. To obtain a
precise adjustment, it would be advisable to
check the number of clicks or turns of each
damping force adjusting mechanism and to
modify the specifications as necessary. Spring preload1. Loosen the locknut.
2. Turn the spring preload adjusting nut in direction (a) to increase the spring pre-
load and thereby harden the suspension,
and in direction (b) to decrease the spring
preload and thereby soften the suspen-
sion.
TIPA special wrench can be obtained at a
Yamaha dealer to make this adjustment.
 The spring preload setting is determined by
measuring distance A, shown in the illustra-
tion. The shorter distance A is, the higher
the spring preload; the longer distance A is,
the lower the spring preload. With each
complete turn of the adjusting nut, distance
A is changed by 1.5 mm (0.06 in). 1. Special wrench
2. Locknut
3. Spring preload adjusting nut
2
1
3
(a)
(b)
U2MB7AE0.book Page 23 Thursday, January 29, 2015 3:42 PM

4-24
4
3. Tighten the locknut to the specifiedtorque. NOTICE: Always tighten the
locknut against the adjusting nut, and
then tighten it to the specified torque.
[ECB00082]
Rebound damping force
Turn the rebound damping force adjusting
screw in direction (a) to increase the rebound
damping force and thereby harden the damp-
ing, and in direction (b) to decrease the re-
bound damping force and thereby soften the
damping.
Spring preload setting: Minimum (soft):Distance A = 313.5 mm (12.34 in)
Standard: Distance A = 305.5 mm (12.03 in)
Maximum (hard): Distance A = 298.5 mm (11.75 in)1. Distance A
1
Tightening torque:Locknut:30 Nm (3.0 m·kgf, 22 ft·lbf)1. Rebound damping force adjusting screw
1
(a)
(b)
U2MB7AE0.book Page 24 Thursday, January 29, 2015 3:42 PM

4-25
4
Compression damping force
Compression damping force (for fast com-pression damping)To increase the compression damping force
and thereby harden the compression damp-
ing, turn the compression damping force ad-
justing bolt in direction (a). To decrease the
compression damping force and thereby
soften the compression damping, turn the
adjusting bolt in direction (b).Rebound damping setting:Minimum (soft):30 click(s) in direction (b)*
Standard: 13 click(s) in direction (b)*
Maximum (hard): 1 click(s) in direction (b)*
* With the adjusting screw fully turned in di- rection (a)
1. Compression damping force adjusting bolt (for fast compression damping)Compression damping setting (for fast com-
pression damping):
Minimum (soft):2 turn(s) out from the fully turned in posi-
tion
Standard: 1 1/4 turn(s) out from the fully turned in
position
Maximum (hard): Adjusting bolt fully turned in
1(a)
(b)
U2MB7AE0.book Page 25 Thursday, January 29, 2015 3:42 PM

4-26
4
Compression damping force (for slow com-pression damping)To increase the compression damping force
and thereby harden the compression damp-
ing, turn the compression damping force ad-
justing screw in direction (a). To decrease the
compression damping force and thereby
soften the compression damping, turn the
adjusting screw in direction (b).
WARNING
EWB00411These shock absorber assemblies contain
highly pressurized nitrogen gas. Read and
understand the following information be-
fore handling the shock absorber assem-
blies.
 Do not tamper with or attempt to open
the cylinder assemblies.
 Do not subject the shock absorber as-
semblies to an open flame or other high
heat source. This may cause the unit to
explode due to excessive gas pressure.
1. Compression damping force adjusting screw (for slow
compression damping)
1(a)
(b)
Compression damping setting (for slow com-
pression damping):
Minimum (soft):18 click(s) in direction (b)*
Standard: 12 click(s) in direction (b)*
Maximum (hard): 1 click(s) in direction (b)*
* With the adjusting screw fully turned in di- rection (a)
U2MB7AE0.book Page 26 Thursday, January 29, 2015 3:42 PM

4-27
4
Do not deform or damage the cylinders
in any way. Cylinder damage will result in
poor damping performance.
 Do not dispose of a damaged or worn
out shock absorber assembly yourself.
Take the shock absorber assembly to a
Yamaha dealer for any service. EBU33620Adjusting the rear shock absorber as-
sembliesThese shock absorber assemblies are
equipped with a spring preload adjusting nut,
a rebound damping force adjusting screw, a
compression damping force adjusting bolt
(for fast compression damping), and a com-
pression damping force adjusting screw (for
slow compression damping).
WARNING
EWB02492 Suspension components become hot
during operation. Never touch the com-
pression damping force adjusting bolt and screw, the rebound damping force
adjusting screw or the oil reservoir with
your bare hand or skin until suspension
components have cooled.
 Always adjust the shock absorber as-
semblies on the left and right side to the
same setting. Uneven adjustment can
cause poor handling and loss of stability,
which could lead to an accident.
NOTICEECB00091Never turn an adjusting mechanism be-
yond the minimum and maximum settings. TIPAlthough the total number of clicks or turns of
a damping force adjusting mechanism may
not exactly match the following specifications
due to small differences in production, the ac-
tual number of clicks or turns always repre-
sents the entire adjusting range. To obtain a
precise adjustment, it would be advisable to
U2MB7AE0.book Page 27 Thursday, January 29, 2015 3:42 PM

4-28
4
check the number of clicks or turns of each
damping force adjusting mechanism and to
modify the specifications as necessary. Spring preload1. Loosen the locknut.
2. Turn the spring preload adjusting nut in direction (a) to increase the spring pre-
load and thereby harden the suspension,
and in direction (b) to decrease the spring
preload and thereby soften the suspen-
sion.
TIPA special wrench can be obtained at a
Yamaha dealer to make this adjustment.
 The spring preload setting is determined by
measuring distance A, shown in the illustra-
tion. The shorter distance A is, the higher
the spring preload; the longer distance A is,
the lower the spring preload. With each
complete turn of the adjusting nut, distance
A is changed by 1.5 mm (0.06 in). 1. Locknut
2. Spring preload adjusting nut
3. Special wrench
1
3
2
(a)
(b)
U2MB7AE0.book Page 28 Thursday, January 29, 2015 3:42 PM

4-29
4
3. Tighten the locknut to the specifiedtorque. NOTICE: Always tighten the
locknut against the adjusting nut, and
then tighten it to the specified torque.
[ECB00082]
Rebound damping force
Turn the rebound damping force adjusting
screw in direction (a) to increase the rebound
damping force and thereby harden the damp-
ing, and in direction (b) to decrease the re-
bound damping force and thereby soften the
damping.
Spring preload setting: Minimum (soft):Distance A = 386.0 mm (15.20 in)
Standard: Distance A = 378.0 mm (14.88 in)
Maximum (hard): Distance A = 372.0 mm (14.65 in)1. Distance A
1
Tightening torque: Locknut:30 Nm (3.0 m·kgf, 22 ft·lbf)1. Rebound damping force adjusting screw
1
(a)
(b)
U2MB7AE0.book Page 29 Thursday, January 29, 2015 3:42 PM

4-30
4
Compression damping force
Compression damping force (for fast com-pression damping)To increase the compression damping force
and thereby harden the compression damp-
ing, turn the compression damping force ad-
justing bolt in direction (a). To decrease the
compression damping force and thereby
soften the compression damping, turn the
adjusting bolt in direction (b).Rebound damping setting:Minimum (soft):30 click(s) in direction (b)*
Standard: 14 click(s) in direction (b)*
Maximum (hard): 1 click(s) in direction (b)*
* With the adjusting screw fully turned in di- rection (a)
1. Compression damping force adjusting bolt (for fast compression damping)Compression damping setting (for fast com-
pression damping):
Minimum (soft):2 turn(s) out from the fully turned in posi-
tion
Standard: 1 1/4 turn(s) out from the fully turned in
position
Maximum (hard): Adjusting bolt fully turned in
1
(a)
(b)
U2MB7AE0.book Page 30 Thursday, January 29, 2015 3:42 PM

4-31
4
Compression damping force (for slow com-pression damping)To increase the compression damping force
and thereby harden the compression damp-
ing, turn the compression damping force ad-
justing screw in direction (a). To decrease the
compression damping force and thereby
soften the compression damping, turn the
adjusting screw in direction (b).
WARNING
EWB03500These shock absorber assemblies contain
highly pressurized nitrogen gas. Read and
understand the following information be-
fore handling the shock absorber assem-
blies.
 Do not tamper with or attempt to open
the cylinder assemblies.
 Do not subject the shock absorber as-
sembly to an open flame or other high
heat source. This may cause the unit to
explode due to excessive gas pressure.
1. Compression damping force adjusting screw (for slow
compression damping)
1
(a)
(b)
Compression damping setting (for slow com-
pression damping):
Minimum (soft):18 click(s) in direction (b)*
Standard: 12 click(s) in direction (b)*
Maximum (hard): 1 click(s) in direction (b)*
* With the adjusting screw fully turned in di- rection (a)
U2MB7AE0.book Page 31 Thursday, January 29, 2015 3:42 PM

4-32
4
Do not deform or damage the cylinders
in any way. Cylinder damage will result in
poor damping performance.
 Do not dispose of a damaged or worn
out shock absorber assembly yourself.
Take the shock absorber assembly to a
Yamaha dealer for any service. EBU31550Trailer hitch bracket and receiverThis vehicle is equipped with a trailer hitch
bracket and a 5 cm (2 in) receiver for a stan-
dard trailer hitch. Tr ailer towing equipment
can be obtained at a Yamaha dealer. (See
page 6-7 for precaution information.)
EBU32950Auxiliary DC jackThe auxiliary DC jack is located at the right
side of the storage compartment under the
multi-function meter. The auxiliary DC jack
can be used for suitable work lights, radios,
etc. The auxiliary DC jack should only be used
when the engine is running and the headlights
are turned off.1. Trailer hitch bracket
2. Receiver
1
2
U2MB7AE0.book Page 32 Thursday, January 29, 2015 3:42 PM