How to Bleed and Replace Brake Fluid on a 2016 Honda TRX500 Foreman 4X4 POWER STEERING (FM2)
Shop parts for a 2016 Honda TRX500 Foreman 4X4 POWER STEERING (FM2) ATV.
This MotoSport guide covers a complete, practical procedure to flush and replace brake fluid on the 2016 Honda TRX500 Foreman 4X4 Power Steering (FM2). It is written for the owner who wants a safe, effective brake-fluid service with minimal fuss. Read all steps before starting and perform work on a level surface with the engine off and key removed.
What you need
- DOT 4 brake fluid (Honda recommends DOT 4; use fresh, unopened fluid)
- Brake-bleeding kit or clear tubing and a catch bottle
- Brake vacuum pump or hand pump (optional but speeds single-person bleeding)
- Open-end wrench set (bleeder nuts usually 8mm or 10mm)
- Screwdrivers, pliers, clean rags
- Latex or nitrile gloves and eye protection
- Shop light, jack stands or ramps, wheel chocks
- Disposable container for old fluid and absorbent mat for spills
Safety and prep
- Protect painted surfaces & plastics from brake fluid; it damages paint immediately. Cover surrounding areas with rags or plastic.
- Never reuse drained fluid. Brake fluid is hygroscopic and absorbs moisture, which reduces braking performance and causes corrosion.
- Keep the brake-fluid reservoir cap closed except when adding fluid to minimize moisture uptake.
- Park ATV on a level surface with wheels chocked. Wear gloves & eye protection.
Identify reservoirs & bleed points
The TRX500 Foreman FM2 uses hydraulic brake circuits with a master cylinder and calipers. Confirm reservoir(s) location before starting; the main brake-fluid reservoir is accessible near the handlebar/master cylinder area. Each caliper has a bleeder screw with a rubber cap. If your machine has separate front and rear reservoirs or a combination valve, follow the general bleed sequence below (farthest caliper from the reservoir first).
Recommended bleed sequence
Standard effective sequence: start with the caliper farthest from the master cylinder, then next farthest, finishing with the closest. Typical ATV order is:
- Rear caliper (farthest)
- Front passenger-side caliper
- Front driver-side caliper (closest)
If your model has a separate rear circuit or combination valve, consult the machine-specific diagram in the service manual and bleed each independent circuit using the farthest-to-closest rule for that circuit.
Step-by-step bleed & fluid replacement
- Remove the reservoir cap and diaphragm; clean around the cap to prevent contamination.
- Top the reservoir to the FULL mark with DOT 4 fluid and keep it topped during the entire procedure.
- Raise the ATV so wheels are off the ground and accessible. Support securely.
- Start at the caliper farthest from the master cylinder. Remove the bleeder-cap and attach clear tubing to the bleeder nipple; place the other end in a catch bottle partially filled with clean brake fluid to prevent air backflow.
- Have an assistant slowly squeeze the brake lever/pedal several times and hold it depressed while you open the bleeder nut about 1/4 to 1/2 turn. Fluid and air will travel into the tubing. Close the bleeder before the assistant releases the lever. Repeat until clear fluid with no bubbles appears, then tighten bleeder to spec (hand tight plus a small fraction of a turn).
- If you are alone, use a handheld vacuum bleeder or a pressure bleeder. With a vacuum pump, pull fluid through the bleeder while watching the reservoir and keeping it topped. With a pressure bleeder, pressurize the reservoir per pump instructions and open bleeders one at a time until clear fluid flows.
- After completing the farthest caliper, move to the next farthest and repeat. Always keep reservoir level between MIN and MAX; do not let it go dry or air will re-enter the system.
- Finish at the closest caliper. After final bleeder cycle, confirm the lever/pedal feels firm and does not sink. If soft, repeat bleeding until stiff.
- Once satisfied, tighten all bleeders, replace rubber caps, clean spilled fluid immediately, and reinstall reservoir diaphragm and cap.
- Lower the ATV, torque wheel fasteners to spec, and perform a slow test ride in a safe area to verify solid braking and no leaks.
Bench-bleeding a replaced master cylinder
If you replace the master cylinder, bench-bleed it before installation: mount it in a vise, fill with fluid, and use the supplied bench-bleed tubes to cycle fluid until no bubbles appear. This prevents introducing air into the system when installed.
Common pitfalls & troubleshooting
- Soft lever after bleeding: most common causes are air left in system or reservoir running dry. Repeat bleeding keeping reservoir topped.
- Leaking bleeder or banjo bolt: tighten to spec and replace crush washers if applicable. Replace corroded bleeder screws.
- Contaminated fluid or rusty lines/calipers: flushing only will not fix severe internal corrosion; consider caliper or line replacement.
- Paint damage: if fluid contacts painted surfaces, wash immediately with water and automotive soap.
Model-specific notes for the 2016 TRX500 Foreman 4X4 POWER STEERING (FM2)
- This Foreman features a power steering system separate from the brake system. Power-steering fluid is different; bleeding the brakes will not affect power steering unless hoses are crossed during work. Keep both reservoirs clearly identified.
- The TRX500 uses DOT 4 brake fluid from the factory; DOT 5 silicone fluid is not compatible. Follow MotoSport-recommended DOT 4 products for optimal performance.
- Some 2016 Foreman models have a combined master-cylinder/reservoir layout accessible at the handlebar. Because of compact routing, take care when routing tubing and when turning the handlebars during bleeding to avoid kinking supply lines.
- Inspect brake hoses for cracks and calipers for leaks during the service. The FM2 chassis and use-case (work & trail) make hose abrasion and heat cycling more likely than on street bikes.
- If your Foreman has a locking differential or heavy rear work use, check rear-brake hardware and mounting bolts for proper torque after bleeding; heavy loads increase wear on rear brake components.
Maintenance intervals & disposal
Replace brake fluid every 1-2 years or sooner if the fluid appears dark or contaminated. Properly store and dispose of used brake fluid per local regulations; do not pour it down drains.
Final checks
- Verify no leaks at bleeders, calipers, banjo fittings, or master-cylinder sealing surfaces.
- Confirm lever/pedal feel is firm and consistent. Test brakes at low speed in a safe area before normal use.
This procedure is MotoSport's recommended approach for a reliable brake-fluid change on the 2016 Honda TRX500 Foreman 4X4 POWER STEERING (FM2). If you're unsure about any step or encounter persistent issues, have a certified ATV technician perform a complete inspection and service.
Related Shopping Categories
Shop Brake Fluid for a 2016 Honda TRX500 Foreman 4X4 POWER STEERING (FM2) ATV.
Shop Brake Bleeders for a 2016 Honda TRX500 Foreman 4X4 POWER STEERING (FM2) ATV.
Shop Brake Pads for a 2016 Honda TRX500 Foreman 4X4 POWER STEERING (FM2) ATV.
Shop Brake Lines for a 2016 Honda TRX500 Foreman 4X4 POWER STEERING (FM2) ATV.
Shop Brake Tools for a 2016 Honda TRX500 Foreman 4X4 POWER STEERING (FM2) 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.