Honda GOLDWING GL1800/A 2015 Owner's Manual page 196

The rear suspension spring pre-load adjustment system has 26 positions (from
0 to 25) for different road or riding conditions. (Standard position is 0.)
Adjustment
1. Place the motorcycle on its center stand on a firm, level surface. To prevent
discharging the battery, make sure the audio system and other electrical
accessories are off.
2. Turn the ignition switch to ON or ACC.
3. Push the DOWN or UP side of rear suspension spring pre-load adjustment
switch until the desired pre-load is reached.
To increase (HIGH)
(Models not equipped with
Navigation System)
To decrease (LOW)
(Models not equipped with
Navigation System)
rear suspension spring pre-load
adjustment switch
Suspension
MEMO button
(Models equipped with
Navigation System)
(Models equipped with
Navigation System)
Servicing Your Honda
193