How to bleed and replace brake fluid on a 1999 Honda TRX250 RECON
Shop parts for a 1999 Honda TRX250REC ATV.
This proprietary MotoSport guide walks you through a safe, complete brake fluid replacement and bleed on a 1999 Honda TRX250 RECON. Follow each step carefully, keep your work area clean, and dispose of old fluid responsibly. Use proper protective gear & take your time; brakes are critical to safety.
What you need
- DOT brake fluid specified by Honda (check owner's manual; DOT 3 is commonly used)
- Clear plastic hose that fits bleed nipples
- Catch bottle/container and rags
- Wrench for bleed nipples and banjo/line fittings (metric set)
- Turkey baster or fluid syringe for removing old fluid from reservoir
- Brake cleaner and small brush
- Gloves and eye protection
- Assistant (recommended) or a vacuum/bottle bleeder tool
Model notes specific to the 1999 TRX250 RECON
- Reservoir location: typically the master cylinder reservoir is mounted near the handlebar area; confirm its position before starting.
- Brake system layout: the TRX250 RECON uses a hydraulic front brake circuit and a hydraulic rear brake circuit; bleed each circuit separately.
- Use DOT fluid only — do not substitute mineral oil. Mixing fluid types will damage seals.
- Inspect banjo bolts, crush washers and hose condition while lines are open — older Recon machines can have corroded fittings and degraded hoses; replace if there is rust, swelling or hard spots.
- If the master cylinder reservoir cap has a foam or rubber diaphragm, keep it clean and re-seat it carefully when refilling to avoid air entry.
Preparation
- Park the ATV on level ground. Secure with wheel chocks and set the parking brake if available.
- Remove dirt from around the reservoir cap and bleed nipples with a brush & brake cleaner so contamination does not fall into the system.
- Open the reservoir cap and remove old fluid from the top using a turkey baster or syringe until the fluid level is low but not empty. Do not let the reservoir run completely dry if possible — keep some fluid in the system to prevent extra air entry.
- Refill the reservoir with fresh DOT fluid to the upper level mark. Keep the cap off but the diaphragm in place while you work.
Bleed sequence & method
Bleed one circuit at a time. For each circuit, follow this general sequence: bleed the caliper furthest from the master cylinder first, then the closer one, ending at the master cylinder. If there is only one caliper in the circuit, bleed that unit until clear, bubble-free fluid flows.
Traditional two-person pump-and-hold method
- Attach clear hose to the bleed nipple and place the other end into a catch bottle partially filled with a little fresh fluid to prevent air re-entry.
- Have your helper slowly pump the brake lever or pedal several times and hold pressure on the last stroke.
- Open the bleed nipple about a quarter turn to let fluid and air escape until flow slows, then close the nipple while pressure is still applied. Instruct the helper to release the lever/pedal only after the nipple is closed.
- Repeat pump-hold-open-close until the expelled fluid is clear and bubble-free, and the reservoir level remains stable. Top up reservoir frequently to prevent it from running dry.
- When finished, tighten the bleed nipple to specified snugness, wipe any spilled fluid, and move to the next caliper or circuit.
One-person vacuum or pressure bleeder method
- Connect your vacuum pump or pressure bleeder per the manufacturer instructions. Vacuum at the bleed nipple will draw fluid through; pressure in the reservoir will push fluid out.
- Open the bleed nipple and draw until clear fluid runs without bubbles. Keep reservoir topped as needed.
- Close the bleed nipple before removing vacuum/pressure, then test lever/pedal feel.
Flushing the entire system
- Repeat bleeding until new fresh fluid flows at every bleed point and the reservoir is filled to the proper mark with only new fluid.
- Operate the brake several times to check firmness. If the lever/pedal still feels spongy, repeat bleeding until solid. Consider a longer bleed cycle if the system has stubborn air pockets.
Final checks
- Tighten all banjo bolts and bleed nipples to torque spec if known; otherwise snug properly without rounding heads.
- Clean any spilled brake fluid immediately & inspect brake linings/rotors/drums for fluid contamination. Replace pads or shoes if contaminated.
- Check for leaks at lines, fittings and the master cylinder after a short test ride at low speed.
- Dispose of used brake fluid per local regulations; do not pour on the ground.
Troubleshooting & tips
- Persistent sponginess after thorough bleeding can indicate a worn master cylinder, collapsed hoses or internal leaks — inspect and replace components as necessary.
- If you encounter rusted or rounded bleed nipples, apply penetrating lubricant and let soak; if still immovable, cut the line and replace the hose assembly rather than risk damaging calipers.
- Keep work area and components clean — brake fluid absorbs moisture and dirt, which degrades braking performance.
Perform a careful low-speed test in a safe area before returning to regular riding. If you are not comfortable performing these procedures, have a qualified mechanic service the brakes.
Related Shopping Categories
Shop Brake Fluid for a 1999 Honda TRX250REC ATV.
Shop Brake Bleeders for a 1999 Honda TRX250REC ATV.
Shop Brake Pads for a 1999 Honda TRX250REC ATV.
Shop Brake Lines for a 1999 Honda TRX250REC ATV.
Shop Brake Tools for a 1999 Honda TRX250REC 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.
