Honda TRX420FPA Owner's Manual page 154

Worn brake pads should be replaced. If the pads are not worn, have your
brake system inspected for leaks.
Rear Brake Fluid Level
RIGHT SIDE
(1) UPPER level mark
With the ATV in an upright position, check the fluid level.
It should be between the UPPER ( ) and LOWER ( ) level mark. If the
level is at or below the LOWER level mark, check the brake pads for
wear (page 147 ).
Worn brake pads should be replaced. If the pads are not worn, have your
brake system inspected for leaks.
Other Inspections
Make sure there are no fluid leaks.
Check for deterioration or cracks in the hoses and fittings. If the hoses
are worn or cracked, have them replaced by your Honda dealer.
(2) LOWER level mark
1 2
Servicing Your Honda
Brakes
(1)
(2)
145