Yamaha YZ125(R)/LC Owner's Service Manual page 554

TUN
SETTING
cC
When using a rear cushion other than cur-
rently installed, use the one whose overall
a a does not exceed the standard as
length
it may result in faulty performance. Never
use one whose overall length is greater
than standard.
Length a a of standard shock:
490.5 mm (19.31 in)
å Coverage of spring by weight
∫ Rider weight
1 Soft
2 Standard
3 Stiff
7-22