How to bleed & replace brake fluid on a 2016 Honda TRX500 Rubicon 4X4 DCT (FA5)

Shop parts for a 2016 Honda TRX500 Rubicon 4X4 DCT (FA5) ATV.

This MotoSport guide walks you through a clean, safe, and reliable brake-fluid replacement and bleed for the 2016 Honda TRX500 Rubicon 4X4 DCT (FA5). Follow each step and use proper PPE. If you're unsure about any step, stop and consult a professional technician.

What you need

  • Correct brake fluid (use the spec in your owner's manual – Honda-approved DOT 3 or DOT 4). Do not mix with mineral oil.
  • Clear plastic tubing that fits snugly over bleed nipples
  • Catch bottle or jar (marked and dedicated for brake fluid only)
  • Wrenches for the bleed nipples (usually 8 mm or 10 mm)
  • Brake-fluid syringe, vacuum pump, or hand-pump bleeder (optional but speeds the job)
  • Clean lint-free rags, gloves, eye protection
  • Small funnel and turkey baster or syringe to remove old fluid from reservoirs
  • Service manual or a way to confirm torque values for caliper bolts if you remove components

Safety & prep

  • Work on a level surface. Set the ATV in park/neutral and engage the parking brake or wheel chocks so the machine cannot roll.
  • Brake fluid damages paint and plastics – cover painted surfaces and immediately wipe any spills.
  • Do not let the brake reservoirs run dry during the procedure; air in the system will require extra work to remove.

Model-specific notes for the 2016 TRX500 Rubicon 4X4 DCT (FA5)

  • The TRX500 Rubicon DCT uses conventional hydraulic brakes with separate front and rear master reservoirs – the front lever reservoir is on the handlebar, the rear master cylinder reservoir is near the rear brake pedal area. Treat each circuit separately.
  • The transmission is a Dual Clutch Transmission (DCT); it does not alter the brake components, but always ensure the machine is secured while you operate brakes during bleeding.
  • If your ATV has factory accessory bumpers or racks, ensure they don't block access to reservoirs or calipers. Some aftermarket racks may require removal for clear access.
  • If your TRX500 is used for heavy-duty work or frequent wet use, brake fluid may darken sooner – inspect and replace every 1-2 years or per severe-use schedule.

Overview of the process

The goal: remove old, moisture-laden fluid and replace with fresh fluid while purging all air. Work one brake circuit at a time. Always start with the caliper farthest from the corresponding master reservoir and finish with the closest.

Step-by-step procedure

1. Access reservoirs

  1. Clean the area around each reservoir cap to prevent contamination.
  2. Remove the reservoir caps and diaphragms. Keep caps and diaphragms clean and covered to avoid dirt entry.

2. Remove old fluid from reservoirs

  1. Use a syringe or turkey baster to remove most of the old fluid from the reservoir(s). Dispose of old fluid properly.
  2. Top up reservoirs with fresh brake fluid to the specified level but do not overfill.

3. Identify bleed order

  1. For each circuit, start at the caliper farthest from that reservoir and proceed to the closest. For example, for the rear master start with the rear caliper farthest from the master; for the front lever master bleed the farthest front caliper first.

4. Attach tubing and prepare catch bottle

  1. Slip clear tubing over the bleeder nipple and route the other end into a partly filled catch bottle to prevent air from being drawn back into the system.
  2. Keep the reservoir topped up during the whole procedure.

5. Bleeding methods (pick one)

  • Manual partner method: One person holds the brake lever/pedal at a mid-stroke position while another opens the bleed nipple briefly to let fluid escape, then closes the nipple, repeat until clear fluid appears and no air bubbles show. Always close the nipple before the lever/pedal is released.
  • One-person pressure or vacuum method: Use a hand pump or vacuum bleeder to draw fluid through from caliper to reservoir. This is cleaner and easier for solo work. Follow the tool manufacturer's directions.

6. Bleeding sequence and technique

  1. With tubing attached, crack the bleeder nipple approximately a quarter-turn.
  2. Apply steady pressure to the lever or pedal (or operate the pump). Watch the tubing for bubbles. Keep the reservoir topped up.
  3. When fluid is clear and bubble-free, tighten the bleeder nipple while the lever/pedal is held in the applied position to avoid drawing air back in.
  4. Move to the next caliper in the sequence and repeat until every caliper on that circuit shows clear, bubble-free fluid.
  5. Repeat the entire process for the other circuit (front or rear) following its farthest-to-closest sequence.

7. Final steps

  1. After all calipers are bled, top each reservoir to the correct level and reinstall the diaphragms and caps securely.
  2. Wipe down all components, remove tubing and catch bottle, and properly dispose of old fluid per local regulations.
  3. Test brake feel with the ATV securely supported: apply lever/pedal repeatedly to confirm firm, consistent pressure. If the lever feels spongy, repeat the bleeding procedure.
  4. Road/test in a controlled area at low speed to confirm braking performance before normal use.

Tips & troubleshooting

  • If you keep getting air from a caliper, check caliper and piston seals for leaks, and ensure the bleeder nipple threads and seat are clean and undamaged.
  • Do not reuse brake-fluid containers once opened for bleeder filling – moisture contaminates fluid quickly. Use fresh, sealed containers.
  • If the brake pedal or lever bottoms out after bleeding, there may still be air in the system or a leak – inspect lines, fittings, calipers, and master cylinder.
  • When using a pressure bleeder, set pressure low and monitor the reservoir closely to avoid forcing fluid past seals.

Maintenance reminders

  • Change brake fluid every 1-2 years under normal use; sooner under heavy, wet, or frequent-load conditions.
  • Inspect brake pads and rotors while bleeding – replace pads that are worn near the wear limit and rotors with deep grooves or warping.
  • Keep a record of date and mileage/hours for the brake-fluid change for future maintenance planning.

Follow these steps and your Honda TRX500 Rubicon DCT will have fresh fluid and a bleed free of air. When in doubt, have a qualified MotoSport service partner inspect and complete the work.

Related Shopping Categories

Shop Brake Fluid for a 2016 Honda TRX500 Rubicon 4X4 DCT (FA5) ATV.

Shop Brake Bleeders for a 2016 Honda TRX500 Rubicon 4X4 DCT (FA5) ATV.

Shop Brake Pads for a 2016 Honda TRX500 Rubicon 4X4 DCT (FA5) ATV.

Shop Brake Lines for a 2016 Honda TRX500 Rubicon 4X4 DCT (FA5) ATV.

Shop Brake Tools for a 2016 Honda TRX500 Rubicon 4X4 DCT (FA5) 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.