How to bleed and replace brake fluid on a 2020 Honda TRX250 RECON ES
Shop parts for a 2020 Honda TRX250 RECON ES ATV.
This MotoSport-exclusive guide walks you through safely flushing and replacing the brake fluid on a 2020 Honda TRX250 RECON ES. Follow these steps precisely to maintain firm, consistent braking and prevent premature system wear.
Notes specific to the 2020 TRX250 RECON ES
- The RECON ES has a hydraulic front lever master cylinder and a rear brake master cylinder actuated by the foot pedal; both use hydraulic fluid in separate circuits.
- Honda recommends DOT 3 or DOT 4 brake fluid. Use fresh, unopened fluid and never mix with DOT 5 silicone fluid.
- The bike has exposed painted plastics that brake fluid will damage on contact; always cover surrounding surfaces and wipe spills immediately.
- There is no factory ABS on this model, so bleeding the individual circuits will affect only that circuit's caliper(s).
Tools & materials
- Fresh DOT 3 or DOT 4 brake fluid
- Clear plastic hose that fits snugly over bleeder nipples
- Small catch bottle or jar (marked for brake fluid waste)
- Rubber gloves, safety glasses, shop rags
- Brake bleeder wrench or correctly sized open wrench
- Bench or hand vacuum bleeder OR helper for pump & hold method
- Torque wrench for caliper/bracket fasteners when re-installing
- Clean syringe or turkey baster (optional) for reservoir fluid removal
Preparation
- Park the ATV on level ground, engine off, ignition to run position if needed to pressurize the system but don't start the engine.
- Stabilize the machine with a stand so wheels are on the ground (brake bleeding is best with normal wheel position).
- Clean around both master cylinder reservoirs and bleeder screws to prevent contamination.
- Remove reservoir caps and diaphragms. Plug the openings with shop rags to keep dirt out while topping and working.
Bleeding sequence
Always start with the caliper farthest from the master cylinder and work toward the closest. On the TRX250 RECON ES this means:
- Rear brake circuit first (rear caliper).
- Front brakes next. If there are two front calipers, bleed the one farthest from the front master, then the nearest.
Bleeding with a vacuum bleeder (recommended)
- Fill the master cylinder reservoir with fresh DOT 3 or DOT 4 fluid. Keep the cap loosely in place so dirt can't enter.
- Attach clear hose to the rear caliper bleeder nipple and place the other end in the catch bottle partially filled with old fluid to prevent air re-ingress.
- Attach the vacuum bleeder to the nipple, open the nipple one turn, pull vacuum and allow fluid to flow until clear, bubble-free fluid appears and no air is visible in the hose.
- Close the bleeder nipple, remove the hose, and top the master cylinder reservoir to the correct level. Repeat for each caliper following the sequence.
- After finishing, pump the brake that was bled a few times to confirm firmness and re-check reservoir level.
Pump & hold method (no vacuum tool)
- Have a helper sit on the ATV, operate the brake lever or pedal and hold steady pressure.
- With the brake held, open the bleeder nipple and allow fluid and air to escape into the hose and catch bottle. Close nipple before the helper releases pressure.
- Top reservoir frequently to avoid drawing air into the master cylinder. Repeat until fluid runs clear and no bubbles appear.
- Finish all circuits in the correct order and test lever/pedal firmness before finalizing.
Finishing steps
- Wipe all fittings clean, torque bleeder nipples and caliper bolts to factory specs if removed (consult your service manual for exact values).
- Replace reservoir diaphragm and cap, ensuring a clean seal to prevent moisture ingress.
- Clean any spilled brake fluid from painted surfaces and plastics immediately using water and a mild detergent; brake fluid will damage paint.
- Dispose of old brake fluid responsibly according to local regulations.
- Test brakes at low speed in a safe area to confirm proper function before normal riding.
Troubleshooting & tips
- Spongy brake feel after bleeding: re-check for air and repeat bleeding; ensure reservoir never ran dry during the process.
- If a bleeder nipple is rounded or stuck, free it carefully with penetrating oil and correct-size tools to avoid damage. Replace if damaged.
- Use short bursts when pumping in the pump & hold method to avoid overheating the brake system during prolonged bleeding sessions.
- Keep new brake fluid sealed until use and store in a cool, dry place to prevent moisture uptake.
Model-specific maintenance reminders
- Inspect brake hoses and banjo fittings for cracking, chafing, or leaks on the TRX250 RECON ES; small ATVs often see hose wear near mounting points.
- Check pad thickness and rotor condition while bleeding. Replace pads if worn close to the backing plate or if rotors are scored beyond service limits.
- The electric start (ES) system adds a battery load; a weak battery can mask brake light switch operation during testing. Verify electrical components after service.
Following this MotoSport guide will keep your TRX250 RECON ES stopping predictably. If you run into persistent issues, contact a qualified mechanic or bring your ATV to a trusted shop.
Related Shopping Categories
Shop Brake Fluid for a 2020 Honda TRX250 RECON ES ATV.
Shop Brake Bleeders for a 2020 Honda TRX250 RECON ES ATV.
Shop Brake Pads for a 2020 Honda TRX250 RECON ES ATV.
Shop Brake Lines for a 2020 Honda TRX250 RECON ES ATV.
Shop Brake Tools for a 2020 Honda TRX250 RECON ES 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.