Yamaha VK PROFESSIONAL-II 2016 Owner's Manual page 37

TIP
 Be sure to make this adjustment when
there is no load (rider or cargo) on the
snowmobile.
 Use the special tools included in the own-
er's tool kit to make the adjustment.
1. Insert the special tools into the 2-up ad-
justing block as shown.
1
1. 2-up position (rider and passenger)
2. Solo rider position
3. Special tool
4. Lock pin
2. Pull the lock pin and turn the special
tools to change the block position.
3. Release the lock pin.
4. Remove the special tools from the 2-up
adjusting block.
ESU13114
Adjusting the spring preload of the
sliding frame extension
EWS00751
WARNING
The left and right spring preloads must be
adjusted to the same setting. Uneven set-
tings can cause poor handling and loss of
stability.
The spring preload of the sliding frame exten-
sion can be adjusted by turning the adjusting
nuts.
2
4
3
Control functions
To increase the spring preload, turn the ad-
justing nut in direction (a). To decrease the
spring preload, turn the adjusting nut in direc-
tion (b).
(a)
(b)
1. Spring preload adjusting nut
2. Distance A
TIP
The spring preload setting is determined by
measuring distance A, shown in the illustra-
tion. The longer distance A is, the higher the
spring preload; the shorter distance A is, the
lower the spring preload.
Spring preload setting*:
Minimum (soft):
13 mm (0.51 in)
Standard:
13 mm (0.51 in)
Maximum (hard):
15 mm (0.59 in)
* Distance A changes 1.25 mm (0.05 in)
with each full turn of the adjusting
nut.
2
1
29