Honda Pioneer SXS700M2P 2019 Owner's Manual page 180

Brakes
Brake Pad Wear
Refer to Safety Precautions on page 105.
Brake pad wear will depend upon the severity of usage and driving
conditions. The pads will wear faster in wet, sandy, or muddy
conditions.
Inspect the pads during all regular service intervals to determine the
pad wear.
Note that the pads are designed to make a metallic noise during
braking when they reach the wear limit.
Front:
If you hear a continuous metallic friction sound when applying the
brakes, the brake pads need to be replaced. Have the vehicle
checked by a dealer.
Rear:
Check the wear indicator. If the wear indicator aligns with the reference
mark, replace both pads as a set, see your dealer for this service.
REAR
reference mark
wear
indicator
170 Servicing Your Honda
brake
caliper