How to Bleed and Replace Brake Fluid on a 2013 Polaris Sportsman XP 550 EFI 4X4
Shop parts for a 2013 Polaris SPORTSX550 ATV.
This MotoSport guide walks you through a safe, effective brake fluid change and bleed on the 2013 Polaris Sportsman XP 550 EFI 4X4. Follow these steps exactly, use the right fluid, and take safety precautions. If you are unsure at any point, stop and consult a qualified technician or the Polaris service manual.
Overview & safety
- The Sportsman XP 550 uses hydraulic disc brakes front and rear. Use fresh DOT 4 brake fluid unless Polaris documentation for your exact build specifies otherwise.
- Brake fluid is hygroscopic and corrosive to paint and rubber. Wear nitrile gloves, eye protection, and protect painted surfaces. Clean spills immediately with water & mild detergent.
- Work on a level surface with the engine off and key removed. Support the ATV with jack stands if wheels are removed. Chock wheels to prevent movement.
- Cannisters of brake fluid should be opened only when ready to use; do not reuse opened fluid that has been exposed to air for long periods.
Tools & supplies
- Fresh DOT 4 brake fluid (1 pint is usually sufficient)
- Clear bleed tubing
- Catch bottle or jar
- Wrench set (metric) for bleed nipples
- Turkey baster or siphon (optional) for reservoir fluid removal
- Vacuum bleeder or pressure bleeder (recommended) or a two-person pump-and-hold arrangement
- Clean lint-free rags, protective gloves, and safety glasses
- Small funnel and shop manual for reference
Preparation
- Locate the master cylinder reservoir. On the Sportsman XP 550 it is typically mounted near the handlebar area under a plastic cover. Clean the area around the cap thoroughly to avoid contamination.
- Remove the reservoir cap & diaphragm carefully and inspect fluid color. Old fluid will be dark brown to black.
- If the reservoir is very low, top it to the MAX line with fresh DOT 4 before beginning. Never let the reservoir run dry during the procedure.
- Identify bleed nipples on each caliper. The vehicle has front left & right and a rear caliper(s); some model variants may have a single rear caliper servicing both rear wheels. Verify caliper locations before starting.
Bleeding strategy
Always start with the caliper farthest from the master cylinder and work toward the closest. On most Sportsman arrangements that means:
- 1st: Rear (farthest)
- 2nd: Front passenger/right
- 3rd: Front driver/left (closest)
If your machine's reservoir or brake plumbing layout differs, follow the "farthest to nearest" rule relative to the master cylinder.
Step-by-step replacement & bleed
- Remove as much old fluid from the reservoir as possible with a turkey baster or siphon. Do not allow suction tool to touch the reservoir sides to avoid contamination.
- Refill reservoir with fresh DOT 4 to the MAX line. Replace cap loosely so it can be opened quickly during the process.
- Attach clear tubing to the first caliper bleed nipple and place the other end in a catch bottle partially filled with fresh fluid to avoid drawing air back into the system. Ensure tubing fits snugly.
- Have an assistant slowly depress the brake lever/pedal several times and then hold it fully depressed (or use a pressure bleeder to maintain positive pressure per manufacturer instructions). If using the pump-and-hold method, do not allow the lever/pedal to return while the nipple is open.
- Open the bleed nipple about a quarter-turn until fluid flows into the tubing. Close the nipple before the assistant releases the lever/pedal. Repeat this cycle until the fluid runs clear with no visible air bubbles, then tighten the nipple to spec snugness (hand-tight plus a small fraction of a turn with the wrench).
- Top off the reservoir as needed after each caliper is bled to prevent it from running dry. Keep the cap or diaphragm loosely in place to reduce contamination.
- Repeat steps 3-6 for each caliper in the sequence from farthest to nearest.
- After the final caliper is bled, pump the brake lever/pedal to build firm pressure. Inspect for firm pedal feel and no sponginess. If soft, repeat bleeding until firm.
- Wipe all fittings & paint surfaces clean. Properly torque any removed caliper hardware to Polaris specifications if you removed components (consult the service manual for torque values).
- Dispose of used brake fluid according to local hazardous waste regulations.
Alternative methods
- Pressure bleeder: Attach to the reservoir and pressurize per manufacturer instructions. Open each bleed nipple in sequence until clean fluid exits. This is the fastest, cleanest method for a one-person job.
- Vacuum bleeder: Fits to the bleed nipple and draws fluid through; keep reservoir topped while vacuuming.
Model-specific notes for the 2013 Polaris Sportsman XP 550 EFI 4X4
- The XP 550 EFI typically has a compact reservoir under the handlebar plastics. Take care removing plastics; small fasteners and clips are easily broken. Keep a soft tray to store fasteners.
- Some 2013 XP 550s were equipped with a combined master cylinder servicing both front & rear via proportioning; the "farthest to nearest" bleeding order remains correct.
- If your unit has accessory winch or electrical modifications, protect wiring & connectors from spilled fluid. Brake fluid can damage wiring harnesses and paint.
- Check caliper boots & lines for cracks or swelling while servicing. The XP 550 is several years old; replacing brittle hoses or worn boots proactively will prevent leaks and air ingestion.
- If rear brake caliper removal is required for access, inspect the rotor and pads for wear & glazing. Replace pads in axle pairs to maintain even braking balance.
Post-bleed checks
- Verify pedal/lever feel under load. A firm, consistent feel indicates success.
- Road-test at low speed in a safe area to confirm brake performance before riding aggressively.
- Recheck the reservoir level after a short ride and top to MAX if needed.
Maintenance tips
- Replace brake fluid every 1-2 years or sooner if you frequently ride in wet conditions or if fluid darkens quickly.
- Keep a small spare bottle of DOT 4 and a sealed funnel in your tool kit for top-offs during trail repairs. Always protect the bottle cap from dirt.
- Document the date and mileage/hours of the fluid change for future reference.
Performing a full brake fluid replacement and bleed on your 2013 Polaris Sportsman XP 550 EFI 4X4 will restore braking performance and extend the life of brake components. When in doubt, refer to Polaris factory service information or contact MotoSport parts & tech support for compatible replacement parts and accessories.
Related Shopping Categories
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Shop Brake Tools for a 2013 Polaris SPORTSX550 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.