Honda FourTrax Rancher TRX420FE1 2019 Owner's Manual page 188

Guards
Front Boot Guards & Front Driveshaft Guard
Refer to Safety Precautions on page 101.
FRONT
(1) front boot guards
Check the front boot guards (1) and front driveshaft guards (2) for
cracks, damage or looseness.
Tighten any loose fasteners. Replace the front boot guards and front
driveshaft guards as required.
178 Servicing Your Honda
(1)
(2)
(2) front driveshaft guards