Honda FOURTRAX 2018 Owner's Manual page 190

Guards
Front Boot Guards & Front Driveshaft Guards
(Except TRX420TE1)
Refer to Safety Precautions on page 103.
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.
180 Servicing Your Honda
(1)
(2)
(2) front driveshaft guards