Honda FourTrax Rancher TRX420FE1 2019 Owner's Manual page 167

Suspension Spring Pre-Load
Refer to Safety Precautions on page 101.
FRONT
(1)
1 2 3 4 5
(1) spring pre-load adjuster
(2) pin spanner
The spring pre-load adjuster (1) has 5 positions for different load or
riding conditions.
Use the pin spanner (2) to adjust the shock spring pre-load.
(2)
Servicing Your Honda
Suspension
REAR
(1)
(2) 1 2 3 4 5
157