How to Bleed & Replace Brake Fluid on a 2013 Honda TRX500 Foreman 4X4 ES

Shop parts for a 2013 Honda TRX500 Foreman 4X4 ES ATV.

This MotoSport-exclusive guide shows a safe, repeatable procedure to flush and replace the brake fluid on your 2013 Honda TRX500 Foreman 4X4 ES. Follow each step carefully, use the correct fluid, and observe all safety precautions. Work on a cool, level surface with the engine off and the parking brake applied.

What you need

  • DOT 4 brake fluid (Honda recommends DOT 4; do not mix with DOT 5 silicone)
  • Clear hose long enough to reach from bleeder nipple to a catch bottle
  • Catch bottle with a small amount of fresh brake fluid to prevent air re-entry
  • 10 mm wrench (bleeder nipple) and appropriate socket for reservoir cap
  • Brake bleeder pump or hand vacuum pump (optional but speeds the job)
  • Clean rags, small brush, and denatured alcohol or brake cleaner
  • Latex or nitrile gloves and eye protection
  • Torque wrench for caliper/rear hub fasteners if you disturb them

Model notes specific to the 2013 TRX500 Foreman 4X4 ES

  • The TRX500 Foreman ES uses hydraulic front disc brakes (one caliper per front wheel) and a hydraulic rear actuator operating a drum-style rear brake assembly. Both systems use the same master cylinder reservoir, so you must bleed the entire system.
  • The brake fluid reservoir is located under the right-hand plastics near the handlebars on ES models with electric start. Remove the small plastic panel; clean the cover area before opening to avoid contamination.
  • Electronic Systems: the ES (electric start) model does not use an ABS system on this platform, so no ABS-related bleed procedure is necessary. If your unit has optional accessories tied to the brakes, secure or disconnect them per factory guidance before starting.
  • If your Foreman has been used in deep water or mud, inspect the rear drum seal and bleeder fittings for contamination and replace any rusty hardware before bleeding.

Safety first

  • Do not let brake fluid contact painted surfaces; it will damage paint. Wipe spills immediately with alcohol.
  • Brake fluid is hygroscopic & absorbs water. Once opened, use fresh fluid and discard any partially used containers older than 12 months or stored improperly.
  • Work with gloves and eye protection. Keep children & pets away.

Preparation

  1. Park on a level surface, set the parking brake, and chock the wheels. Disconnect the negative battery terminal if youu2019ll be removing panels near wiring.
  2. Remove the right-hand plastic panel to access the brake fluid reservoir. Clean around the cap with a brush and rag to prevent dirt getting into the reservoir.
  3. Loosen the reservoir cap and diaphragm, but do not remove until youu2019re ready to add fluid. Top off the reservoir with fresh DOT 4 fluid so itu2019s at the full mark before bleeding.

Bleeding strategy & order

Bleed the system starting with the caliper furthest from the master cylinder and finish at the closest. On the Foreman this typically means:

  1. Rear wheel cylinder (furthest)
  2. Front passenger-side caliper
  3. Front driver-side caliper (closest)

Keep the reservoir topped up during the entire process to prevent air being drawn into the system.

One-person vacuum pump method (recommended)

  1. Attach a clear hose to the bleeder nipple on the furthest brake component and submerge the other end in a bottle containing a small amount of fresh brake fluid. This prevents air re-entry.
  2. Attach the vacuum pump to the bleeder nipple and open the valve. Pull vacuum while an assistant slowly pumps the brake lever/pedal several times and holds it depressed. With the pedal held down, open the bleeder until fluid and bubbles flow into the bottle, then close the bleeder and release vacuum. Repeat until the fluid runs clear with no bubbles.
  3. Close the bleeder and move to the next caliper in the sequence. Replenish the master reservoir after each step so fluid stays at the full mark.
  4. After bleeding the last caliper, pump the brake pedal slowly to seat everything, check reservoir level, and install the cap securely.

Two-person manual bleed method

  1. Person A pumps the brake lever/pedal 6–8 times and holds it down.
  2. Person B opens the bleeder nipple slightly to let fluid and air escape into the hose/bottle. Close the bleeder before Person A releases the lever/pedal. Repeat until no air bubbles appear.
  3. Always keep the reservoir topped off between cycles and follow the same furthest-to-nearest order.

Vacuum or pressure bench tips

A vacuum pump or a pressure bleeder speeds the job and reduces the chance of air being drawn back into the system. If you use a pressure bleeder on the reservoir, set pressure to the tool manufactureru2019s recommended value and bleed each wheel until clear fluid appears.

Final checks

  • Verify the reservoir is at the full mark and install the cap/diaphragm securely.
  • Check tightness of bleeder nipples and any caliper or actuator mounting bolts you disturbed. Torque to factory specs if available.
  • Operate the brake lever/pedal several times to confirm a firm feel. Test brakes at low speed in a safe area before returning to normal riding.
  • Inspect for leaks at calipers, bleeder nipples, and the rear actuator after a short test ride. Re-bleed if the pedal feels spongy.
  • Dispose of used brake fluid according to local regulations; do not pour it down drains.

Maintenance schedule & tips

  • Replace brake fluid every 2 years or sooner if the ATV is used in wet or high-use conditions.
  • After heavy water crossings, inspect seals and fluid contamination; water in the system accelerates corrosion and reduces boiling point.
  • Keep spare bleeder caps on hand for the bleeder nipples to avoid corrosion when parked long-term.

Troubleshooting

  • If you cannot achieve a firm pedal after multiple bleeds, check for a leaking master cylinder, swollen hoses, or a failing wheel cylinder/caliper.
  • Persistent bubbles usually indicate an air source above the bleeder line (loose reservoir cap, cracked hose, or master cylinder internal leak).

Performing a full fluid replacement and bleed on your 2013 Honda TRX500 Foreman 4X4 ES restores braking performance and extends component life. If youu2019re unsure at any step, MotoSport recommends professional servicing to ensure safe operation.

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Disclaimer: This guide is provided for general informational purposes only and is not intended to replace your motorcycle's official owner's manual. Always refer to your manufacturer's documentation for model-specific instructions, torque specifications, safety procedures, and maintenance requirements. If you are unsure or inexperienced, consider seeking assistance from a qualified mechanic or technician.