How to Bleed and Replace Brake Fluid on a 2017 Honda TRX250 RECON
Shop parts for a 2017 Honda TRX250 RECON ATV.
This MotoSport guide walks you through draining, replacing and bleeding the brake fluid on a 2017 Honda TRX250 RECON. The Recon uses conventional hydraulic brake systems: a front lever master cylinder and a rear pedal master cylinder. Follow the steps carefully and treat brake fluid maintenance as safety-critical work.
Warnings & prep
- Work on a cold, level machine with the engine off and the key removed.
- Use only fresh DOT brake fluid type specified by Honda in the owner’s manual (DOT 3 or DOT 4 as listed). Do not mix brake fluid with DOT types not listed in the manual unless explicitly allowed.
- Brake fluid is hygroscopic and will damage painted surfaces. Protect paint and plastics — wipe spills immediately with a clean cloth and isopropyl alcohol if needed.
- Wear nitrile gloves and eye protection. Dispose of used fluid per local regulations.
Tools & supplies
- Fresh DOT brake fluid (quantity: 250–500 mL should be ample)
- Clear plastic tubing that fits snugly over the bleeder nipple
- Small clear bottle for used fluid
- Open-end wrench for bleeder nipple (inspect nipple size before starting)
- Screwdrivers or 5mm/6mm Allen for reservoir caps if needed
- Turkey baster or fluid syringe for reservoir draining
- Vacuum brake bleeder or two-person helper (pump and hold method)
- Clean rags, isopropyl alcohol, and a catch pan
Inspection before you begin
- Check reservoir fluid level and condition. Dark, dirty fluid indicates it’s time to replace.
- Inspect lines for cracks, swelling or leaks. Replace any compromised hoses before flushing fluid.
- Check caliper pistons move freely and pads are in serviceable condition.
Procedure: full fluid replacement and bleed
- Locate the reservoirs: front brake on the right handlebar, rear brake reservoir near the master on the frame. Clean the cap area thoroughly.
- Remove reservoir caps and diaphragms. Use a turkey baster or syringe to remove most old fluid from each reservoir; do not let debris fall in. Wipe the interior clean with a lint-free cloth if needed.
- Top each reservoir with fresh fluid to the specified level. Keep the reservoirs topped during the process to prevent air entry.
- Start with the brake caliper farthest from the master cylinder. For a Recon that has a conventional single-caliper front and single rear caliper, bleed each line at its caliper (front first, then rear is acceptable if using a vacuum method). If you have multiple calipers or a different configuration, follow farthest-to-closest sequence relative to each master cylinder.
- Attach clear tubing to the bleeder nipple and submerge the other end in a small bottle partially filled with fresh brake fluid to prevent air re-entry.
- Two-person pump-and-hold method: one person slowly squeezes the front lever or presses the rear pedal several times, then holds pressure. The second person opens the bleeder nipple briefly to let fluid/air out, then closes it before pressure is released. Repeat until clear, bubble-free fluid appears and no air is expelled. Ensure the reservoir never drops below minimum.
- Vacuum bleeder method: attach the vacuum tool to the bleeder nipple and draw fluid while someone operates the lever/pedal slowly or the lever is cycled with the master. Continue until fluid runs clear and free of bubbles. Keep reservoir topped.
- Close the bleeder nipple securely after each caliper is bled. Wipe fittings clean and check for leaks.
- Repeat for the other brake system if bleeding both front and rear. After bleeding, slowly operate lever and pedal to confirm firm, consistent feel.
- Top reservoirs to the correct level, reinstall diaphragms and caps, and secure them per factory fitment.
- Clean any spilled fluid from paint or plastic immediately. Test brakes at low speed in a safe area before returning to normal riding.
Tips for a reliable bleed
- Do not reuse the first-bled fluid in the catch bottle; it contains air and moisture.
- If you encounter stubborn air or a soft lever/pedal after bleeding, inspect lines, caliper pistons and master cylinder seals for internal leaks that can draw air.
- Replace bleeder nipple crush washers and any corroded hardware for a proper seal.
- If using DOT 4 for slightly higher boiling point, confirm compatibility in the manual. Never mix silicone-based fluids with glycol-based DOT 3/4 fluids.
Model-specific notes for the 2017 Honda TRX250 RECON owner
- Reservoir access is compact on the Recon. Removing the small plastic shrouds or seat may improve access to the rear reservoir and master cylinder for a cleaner bleed procedure.
- The TRX250 RECON typically uses a simple, mechanical master design — no ABS or complex electronics to worry about. That simplifies bleeding but increases the importance of inspecting mechanical components (lever pivot, pedal linkage) for proper function.
- Due to the Recon’s lightweight chassis, brake heat loads are modest; still, old fluid can absorb moisture and reduce boiling point, so replace fluid at recommended intervals or sooner if you ride hard or in wet conditions.
- Spare parts like replacement seals, bleeder screws and reservoir diaphragms are inexpensive and recommended to carry or order when you perform a fluid change.
- If you notice sticking pistons, uneven pad wear or a spongy lever despite correct bleeding, rebuild calipers or master cylinder using OEM-spec parts to restore feel and safety.
Final checks
- Confirm no leaks at connections, a firm lever and pedal feel, and correct fluid level in reservoirs.
- Test ride in a controlled area, gradually applying brakes to seat components and confirm consistent performance before normal operation.
Routine brake fluid replacement extends system life and preserves stopping performance on your TRX250 RECON. Keep a maintenance log with fluid type and change date to track service intervals.
Related Shopping Categories
Shop Brake Fluid for a 2017 Honda TRX250 RECON ATV.
Shop Brake Bleeders for a 2017 Honda TRX250 RECON ATV.
Shop Brake Pads for a 2017 Honda TRX250 RECON ATV.
Shop Brake Lines for a 2017 Honda TRX250 RECON ATV.
Shop Brake Tools for a 2017 Honda TRX250 RECON 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.