Yamaha YZ65 2021 - Page 30

Instrument and control functions
4-13
4
4. Remove the muffler bolt, and then
remove the muffler.
5. Remove the rear frame bolts, and
then remove the rear frame as-
sembly.
6. Loosen the locknut.
7. 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. Bolt
2. Panel
1. Muffler
2. Muffler bolt
1. Rear frame assembly
2. Rear frame bolt
1
2
2
1
2
1
1. Rear frame assembly
2. Rear frame bolt
1. Locknut
2. Spring preload adjusting nut
2
1
1
2
(a)
(b)
UBR811E0.book Page 13 Thursday, March 21, 2019 10:27 AM