Honda FourTrax Recon TRX250TM 2019 Owner's Manual page 132

Brakes
2. Remove the inspection hole plug (2).
3. Measure the lining thickness (3) on both front wheels:
Standard:
Service Limit:
If either lining is worn beyond the limit, both brake shoes must be
replaced by your dealer.
4. If the brake lever freeplay and the brake shoe lining thickness are
within the recommended limits, reinstall the inspection hole
plugs, seating them into the inspection hole as shown.
5. If the brake lever freeplay is excessive but the linings are not worn
beyond the service limit, adjust the brake lining clearance.
(5)
(2)
(2) inspection hole plug
(3) lining thickness
122 Servicing Your Honda
0.16 in (4.0 mm)
0.04 in (1.0 mm)
(4)
(4) front brake drum
(5) front wheel rim
(3)
(2)