How to Bleed & Replace Brake Fluid on a 2017 Honda TRX250 RECON ES

Shop parts for a 2017 Honda TRX250 RECON ES ATV.

This MotoSport-exclusive procedure walks you step-by-step through bleeding and replacing brake fluid on your 2017 Honda TRX250 RECON ES. It's written for home technicians and owners who want a reliable, safe brake-flush job using common tools and best practices specific to this MMY ATV.

What to know about the 2017 TRX250 RECON ES

  • RECON ES is equipped with electrical starting and a simple, compact braking system. Before starting, identify every hydraulic component: handlebar master cylinder (front/hand brake) and any foot-brake master cylinder or caliper/bledder for the rear. Some RECON models use a rear hydraulic circuit; others combine mechanical and hydraulic components — confirm on your machine.
  • Honda typically specifies DOT 3 brake fluid for light ATVs; DOT 4 is acceptable if the manual allows it. Never mix DOT 5 (silicone) with DOT 3/4 fluids.
  • Brake lines, hose clamps, banjo bolts & crush washers on the TRX250 are small and can corrode. Inspect and replace any damaged lines or washers while you have the system open.
  • The plastic master cylinder reservoir cap contains a diaphragm; keep dirt out when open. Avoid spilling fluid on painted parts — it will damage plastics and paint. Wipe spills immediately with water.

Tools & Materials

  • DOT 3 (or recommended) brake fluid, fresh
  • Clear vinyl tubing that fits bleeder nipples
  • Small clear catch bottle partially filled with old fluid to submerge tube end
  • Wrenches for bleeder screws and banjo bolts (often 8mm/10mm)
  • Turkey-baster, suction syringe, or fluid pump for reservoir
  • Hex or screwdriver for reservoir cap, pliers, rags, gloves, safety glasses
  • Torque wrench (recommended) and new crush washers for banjo fittings if you remove them

Safety & Prep

  • Park ATV on level surface, engine off, key removed. Block wheels.
  • Wear gloves & eye protection. Brake fluid is corrosive to paint and plastics.
  • Work one brake circuit at a time. Keep reservoir capped except when actively adding fluid.
  • Have service manual torque specs available if you remove any banjo bolts or lines.

Pre-bleed Inspection

  • Locate each master cylinder reservoir: handlebar lever and any foot-brake reservoir. Note which circuit controls which caliper/drum actuator.
  • Clean around caps and bleeder screws with brake cleaner or a clean rag to prevent contamination.
  • Check hoses and fittings for cracks, swelling, leaks.

Step-by-step: Replace & Bleed Brake Fluid

Follow these steps for each hydraulic circuit. Work from the caliper/farthest from the master cylinder to the closest when multiple calipers are present.

  1. Remove reservoir cap and diaphragm carefully. Use a turkey-baster or syringe to remove most of the old fluid from the reservoir. Do not let dirt enter the reservoir.
  2. Refill reservoir with fresh brake fluid to the MAX line. Keep the cap off only while you are actively bleeding; replace it loosely between steps to reduce contamination.
  3. Attach clear tubing to the bleeder nipple on the caliper. Submerge the tube end in a catch bottle containing a small amount of old fluid to prevent air re-entry.
  4. Have a helper slowly pump the brake lever or pedal several times and hold it down (or use a one-person adapter/pressure bleeder if available).
  5. With lever/pedal held down, open the bleeder nipple about a quarter to half turn. Fluid and air bubbles will flow into the tubing. Close nipple before the helper releases the lever/pedal. Repeat until no air bubbles appear and the fluid runs clear and fresh.
  6. Continuously monitor reservoir level. Never let it drop below the MIN line; top off frequently with fresh fluid.
  7. When the caliper/line shows clear fluid with no bubbles, tighten the bleeder to spec (snug if spec unknown; don't over-torque). Wipe away any spilled fluid immediately.
  8. Move to the next caliper or circuit and repeat the process, always keeping the reservoir topped up.
  9. If you removed any banjo bolts or fittings, replace crush washers and torque bolts to the specified values in the service manual.
  10. After bleeding all circuits, fill reservoir to MAX, reinstall diaphragms and cap, and ensure cap is properly seated.
  11. Cycle the lever/pedal a dozen times to seat pads and check for firm feel. If spongy, re-bleed. Park on a slope-free area and test brake performance at low speed before riding normally.

Troubleshooting & Tips

  • Persistent sponginess indicates trapped air, collapsed hose, or internal master cylinder issues. Inspect hoses and the master cylinder for internal leaks.
  • If a caliper bleeder is stuck or rounded, use proper-size wrench and penetrating lubricant. Replace damaged bleeders to avoid future problems.
  • If you find rusted banjo bolts or corroded lines, replace them. Cheap new crush washers are inexpensive insurance against leaks.
  • Dispose of old brake fluid responsibly; do not dump it on the ground.

Post-service Checks

  • Confirm no leaks at bleeders, banjo bolts, or fittings after a short test ride.
  • Re-check fluid level after a few rides and re-inspect for leaks.
  • Record the service date and mileage in your maintenance log; brake fluid should be replaced periodically per the service schedule or whenever contaminated.

Following this MotoSport-specific guide will keep the TRX250 RECON ES braking system reliable and safe. If you encounter internal master-cylinder failure, severe hose deterioration, or persistent air that won't purge, contact a professional technician or bring your ATV to a service center.

Related Shopping Categories

Shop Brake Fluid for a 2017 Honda TRX250 RECON ES ATV.

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Shop Brake Lines for a 2017 Honda TRX250 RECON ES ATV.

Shop Brake Tools for a 2017 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.