How to Bleed & Replace Brake Fluid on a 2013 Honda TRX500 Foreman 4X4 (FM1)

Shop parts for a 2013 Honda TRX500FORE ATV.

Overview

This MotoSport procedural guide covers safely draining, flushing, and bleeding the hydraulic brake system on a 2013 Honda TRX500 Foreman 4X4 (FM1). Follow each step carefully, use fresh brake fluid specified for the machine, and test brakes before riding.

What you need

  • Brake fluid: DOT 4 (Honda recommends DOT 4 for TRX500 Foreman systems)
  • Clear plastic tubing that fits snugly over bleed nipples
  • Catch bottle for old fluid
  • Brake bleeder wrench or correct-size flare nut wrench
  • Syringe or turkey baster and rags
  • Allen or Torx keys for reservoir fasteners (if applicable)
  • Floor jack or ATV lift and stands
  • Gloves, eye protection, and shop towels
  • Service manual torque figures (recommended)

Model-specific notes for the 2013 TRX500 Foreman 4X4 (FM1)

  • The FM1 TRX500 uses a conventional hydraulic system with separate front calipers and a rear caliper. There is no factory ABS on this model year.
  • Brake lines are routed under the chassis near the front differential and rear swingarm – inspect for wear or chafing before reassembly.
  • The parking brake linkage (if equipped) should be released when bleeding the rear caliper to ensure free fluid flow.
  • Honda recommends DOT 4 fluid for consistent performance; do not mix DOT 4 with silicone-based fluids. Replace rubber reservoir cap seal if hardened or cracked.
  • If the bike has aftermarket brake components or braided lines, follow their bleed recommendations but keep DOT compatibility in mind.

Preparation

  1. Park on level ground, choke/kill engine, set parking brake, and disconnect the negative battery terminal if you will be opening the hydraulic reservoir for extended work.
  2. Raise the ATV so wheels are off the ground and secure on stands. Remove wheels if needed for better caliper access.
  3. Clean the reservoir cap and surrounding area to prevent contamination. Keep rags handy to wipe spilled fluid – brake fluid damages paint and plastics.
  4. Check and record fluid color/level before starting so you know how contaminated the fluid is.

Drain & Replace Brake Fluid (Full flush)

  1. Open the master cylinder reservoir. Siphon as much old fluid out as possible using a syringe or turkey baster. Dispose of old fluid responsibly.
  2. Refill reservoir with fresh DOT 4 fluid to the "MAX" line.
  3. Starting at the caliper farthest from the master cylinder is a best practice – on the TRX500 this is generally the rear caliper first, then the front calipers. If in doubt, find the longest hydraulic run and begin there.
  4. One-person method: attach clear tubing to the caliper bleed nipple and submerge the other end in a small catch bottle containing a little fresh fluid to avoid drawing air back in. Open bleed nipple about 1/4 turn.
  5. Have an assistant slowly squeeze the brake lever/pedal several times and hold pressure while you open the bleed nipple. Fluid and air will exit into the tubing. Close the nipple before the assistant releases the lever/pedal. Repeat until clear, bubble-free fluid flows. Keep the reservoir topped off so it never runs dry.
  6. Two-person method: with the tube and catch bottle attached, your helper pumps the lever/pedal and you open/close the bleed nipple to let fluid escape. Close nipple between strokes. Continue until clear fluid appears and no air is present.
  7. Work through calipers in sequence from farthest to nearest to master cylinder. On TRX500 do rear, then both front calipers (left/right as needed). After each caliper, tighten bleed nipple to spec and wipe clean.
  8. After all calipers are bled, refill reservoir to proper level, reinstall cap and diaphragm securely, and torque any fasteners per Honda specifications.

Benchmarks & final checks

  • Brake lever/pedal should feel firm with no sponginess. If it still feels soft, repeat bleed steps paying attention to reservoir level and potential line leaks.
  • Inspect all fittings and hoses for leaks while an assistant applies pressure. Tighten as needed to spec.
  • Torque wheel and caliper bolts to Honda specs when reinstalling wheels.
  • Clean any spilled fluid immediately and touch up paint if the frame or bodywork was damaged by fluid.
  • Test ride at low speed in a safe area to confirm braking performance before normal use.

Troubleshooting

  • Persistent soft lever after multiple bleeds may indicate a collapsed master cylinder seal, internal leak, or air trapped in ABS/modulator (not applicable on non-ABS TRX500 except aftermarket systems).
  • If you find significant contamination or moisture in the system (dark, murky fluid), perform a full flush until fluid runs clear and a final replacement is recommended at two-year intervals for longevity.
  • Replace any rubber hoses showing cracks or bulging; aging hoses can cause poor pedal feel and contamination.

Disposal & maintenance interval

  • Dispose of used brake fluid through a local hazardous waste program. Do not pour down drains.
  • MotoSport recommends inspecting the brake system annually and replacing brake fluid every 1-2 years depending on use and exposure to moisture.

Related Shopping Categories

Shop Brake Fluid for a 2013 Honda TRX500FORE ATV.

Shop Brake Bleeders for a 2013 Honda TRX500FORE ATV.

Shop Brake Pads for a 2013 Honda TRX500FORE ATV.

Shop Brake Lines for a 2013 Honda TRX500FORE ATV.

Shop Brake Tools for a 2013 Honda TRX500FORE ATV.

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.