How to Bleed & Replace Brake Fluid on a 2017 Honda TRX500 Foreman 4X4 (FM1)

Shop parts for a 2017 Honda TRX500FORE ATV.

This MotoSport guide walks you through a safe, step-by-step brake fluid replacement and bleed procedure tailored to the 2017 Honda TRX500 Foreman 4X4 (FM1). It covers preparation, draining old fluid, bleeding lines to remove air, and final checks so your ATV stops reliably.

Important model notes for the 2017 TRX500 Foreman FM1

  • The FM1 uses independent hydraulic brake circuits with separate master reservoirs for front and rear braking. Confirm the locations of the reservoirs on your machine before starting.
  • Some units may have a sealed rear parking brake assembly or different hardware between model variants. Verify which rear brake hardware is on your ATV and whether a rear caliper bleed nipple is present.
  • Honda specifies the approved brake fluid in the owner's manualuse Honda-approved DOT 3 or DOT 4 brake fluid as specified for your machine. Never mix DOT 5 (silicone) with DOT 3/4 systems.
  • Brake lines, fittings, and rubber hoses on older machines can hide leaks. Inspect lines, banjos, and calipers for corrosion or swelling; replace any suspect components before bleeding.

Tools & supplies

  • Honda-approved DOT brake fluid (use the type in your owner's manual)
  • Clear plastic tubing that fits the bleed nipple
  • Brake fluid collection bottle or jar
  • Wrench set (open-end for bleed nipples and banjo fittings)
  • Screwdriver, pliers, rags, safety glasses, nitrile gloves
  • Assistant (recommended) or a one-person vacuum/pressure bleeder

Preparation

  • Work on a level surface, engine off, key removed, parking brake as required. Set the wheels so you can access calipers/bleed nipples easily.
  • Clean the master cylinder reservoirs and surrounding area thoroughly to prevent contamination when you open them.
  • Remove the reservoir caps and diaphragms; keep the area clean. If the reservoir uses a fluid level sight, note its orientation so you can maintain fluid level during bleeding.
  • Identify bleed nipples on each caliper or wheel cylinder. Fit clear tubing over the nipple and route into a jar partly filled with used fluid (prevents air being sucked back).

Drain & replace brake fluid method A (assistant pump — recommended)

  1. Top off the master reservoir with fresh brake fluid. Do one circuit at a time (front then rear or vice versa); avoid contamination and keep reservoir topped to prevent air intake.
  2. Start with the caliper farthest from the master cylinder and work to the closest. On many machines that is: rear right, rear left, front right, front left – confirm on your machine.
  3. Have your assistant firmly depress and hold the brake lever/pedal. With pedal/lever held, open the bleed nipple about 1/4 turn to allow fluid and air to escape. Close the nipple, then tell the assistant to release the pedal slowly. Repeat.
  4. Continue cycles until clear, bubble-free fluid flows into the jar. After each cycle top off the master reservoir to keep it above the minimum level.
  5. When that wheel is clear, tighten the bleed nipple to spec (snug — avoid rounding off). Wipe spilled fluid immediately — brake fluid damages paint and plastics.
  6. Move to the next caliper in the sequence and repeat until all circuits show clear fluid and no air in the tubing.

Method B: Vacuum or pressure bleeder (one-person)

  • Attach the vacuum/pressure bleeder per tool instructions to the master reservoir or to the bleed nipple as designed. Use a commercially available brake bleeder designed for DOT 3/4 fluid.
  • Operate the bleeder and open bleed nipples in the same wheel sequence (farthest to nearest). Maintain fluid level in the master reservoir. Close nipples when clear fluid without air appears.

Final service checks

  • With all bleed nipples closed and tightened, top the reservoirs to the correct level and reinstall diaphragms and caps cleanly.
  • Operate brake lever/pedal several times to check for firm, consistent feel. If the lever/pedal feels spongy, repeat bleeding until firm.
  • Inspect for leaks at banjo bolts, hose ends, calipers, and master cylinder. Torque fasteners to Honda specs where applicable.
  • Clean any spilled fluid, and remove used fluid from the work area. Dispose of used brake fluid according to local hazardous waste rules.
  • Test ride at low speed in a safe area to confirm braking performance before heavy use.

Maintenance tips specific to your TRX500 Foreman

  • Bleed intervals: replace brake fluid every 1-2 years or if the fluid is dark or contaminated. Frequent water absorption shortens fluid life, especially with heavy towing or frequent wet use.
  • If your TRX500 is used in wet or salty conditions, inspect and replace corroded caliper hardware and brake line clamps; corrosion can cause hidden leaks or restricted flow.
  • If the rear mechanism is drum-style on your variant, inspect the wheel cylinder boots and adjust as needed; drum wheels require a different access procedure for bleeding wheel cylinders.
  • Keep a can of OEM-caliber brake cleaner and fresh backup fluid on hand during trail trips in case a quick top-off is needed before getting home.

Troubleshooting

  • Persistent soft pedal after bleeding: check master cylinder internal seals and calipers for sticking or collapsed hoses; replace components as needed.
  • Air returns after you thought system was bled: inspect for leaks in the system that allow air ingress when pressure is applied.
  • Contaminated or foamy fluid: drain entire system and repeat complete flush; replace any absorptive rubber parts that may be degraded.

Performing a careful, methodical bleed and fluid replacement keeps your TRX500 Foreman FM1 stopping strong and extends component life. When in doubt about specific hardware or fluid type on your machine, refer to the owner's manual or contact MotoSport parts specialists for model-specific parts and recommendations.

Related Shopping Categories

Shop Brake Fluid for a 2017 Honda TRX500FORE ATV.

Shop Brake Bleeders for a 2017 Honda TRX500FORE ATV.

Shop Brake Pads for a 2017 Honda TRX500FORE ATV.

Shop Brake Lines for a 2017 Honda TRX500FORE ATV.

Shop Brake Tools for a 2017 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.