How to Bleed & Replace Brake Fluid on a 2012 Suzuki King Quad 750AXi 4X4 Power Steering

Shop parts for a 2012 SUZUKI KINGQD750P ATV.

This MotoSport guide walks you through safely flushing and bleeding the brake system on the 2012 Suzuki King Quad 750AXi 4X4 POWER STEERING. Follow each step carefully, use the right fluid, and protect painted surfaces & plastics. Recommended brake fluid is DOT 4; do not use DOT 5 (silicone) or mix with power steering fluid. Work in a clean, well-ventilated area and dispose of old fluid responsibly.

Tools & supplies

  • DOT 4 brake fluid (new, unopened)
  • Clear plastic tubing that fits bleeder nipples
  • Brake bleeder catch bottle or jar
  • Box/rubber gloves, safety glasses
  • Combination wrenches (typically 8mm or 10mm for bleeders)
  • Syringe or hand vacuum bleeder (optional but recommended for single-operator jobs)
  • Rags and brake cleaner
  • Jack or ramps and stands to safely support the ATV

Model-specific notes for the King Quad 750AXi

  • The 750AXi uses hydraulic disc brakes front and rear; there are bleeder screws at each caliper. The system accepts DOT 4 fluidverify the cap marking before starting.
  • Power steering on this model is a separate hydraulic circuit. NEVER introduce brake fluid into the power steering reservoir; keep caps clearly labeled and fluids segregated.
  • Stock caliper bleeder fittings are small and can round easilyuse the correct wrench size and avoid over-torquing.
  • Brake fluid is hygroscopic; if the vehicle has been idle for several years, a full flush is strongly recommended and should be followed by replacement of any rubber components that show swelling or deterioration.

Preparation

  1. Park on level ground, set parking brake, remove key, and disconnect the battery negative terminal for safety if you will be around electrical components.
  2. Clean around the brake fluid reservoir cap to prevent contamination. Remove cap and diaphragm; keep reservoir top clean and exposed only to air for short periods.
  3. Raise the ATV on suitable ramps or stands so you can access wheels and calipers; support securely. Remove wheels if needed for caliper access.
  4. Inspect lines, hoses, and calipers for leaks, cracked hoses, or corroded fittings. Replace damaged parts before flushing.

Bleed sequence & method

Bleeding order for the King Quad typically is: farthest wheel from master cylinder first, then progress to nearest. That usually means: rear (if single-caliper system), then right front, then left front. Confirm by locating the master cylinder/reservoir and determining the far/near sides.

Two-person (pump and hold) method

  1. Top the master cylinder reservoir with DOT 4 fluid, keeping it above the minimum level during the procedure.
  2. Have an assistant sit on the machine and slowly depress the brake lever/pedal several times, then hold firm.
  3. Open the bleeder screw at the caliper with a wrench about a quarter to half turn. Fluid and air will flow into the clear tubing into the catch jar. Close the bleeder before your assistant releases the brake.
  4. Repeat: pump to build pressure, hold, open bleeder, close bleeder, then release. Continue until clear, bubble-free fluid emerges and no air is seen in the tubing.
  5. Keep the reservoir topped up through the process to avoid introducing air into the master cylinder.
  6. Work through the wheels in the proper sequence. After final caliper is bled, ensure reservoir is at correct level and reinstall cap securely.

Single-operator vacuum or syringe method

  1. Attach a vacuum bleeder to the bleeder nipple and draw a steady vacuum while keeping the reservoir topped. Operate until fluid runs clear and no air is present.
  2. Or use a syringe to pull fluid from the caliper through the tubing into a waste container while another port remains closed; repeat on each caliper.

Pressure or gravity bench bleeding (optional)

If you have a pressure bleeder, pressurize the master cylinder reservoir per tool instructions and open bleeders in sequence until fluid runs clear. This is fast and effective for a full system flush.

Flushing the system

  • For a full fluid change, continue bleeding each caliper until the fluid coming out matches the new DOT 4 fluid in color and clarity.
  • Replace the reservoir diaphragm and cap once complete. Ensure cap seals to prevent moisture ingress.
  • Wipe spilled brake fluid immediately; it will remove paint. Use brake cleaner to neutralize any residue.

Final checks

  • With ATV supported, gently press the brake lever/pedal several times to build firm pressure. There should be a solid, non-spongy feel.
  • Check all bleeder screws for tightness and inspect for leaks. Torque gentlydo not overtighten. If in doubt, snug to feel.
  • Lower the machine, test brakes at low speed in a safe area, and recheck fluid level and fittings after the first ride.

Maintenance guidance & intervals

  • Brake fluid attracts moisture; replace every 1-2 years depending on riding conditions. Heavy use, trailer pulling, or wet conditions may justify an annual change.
  • Inspect caliper pistons and seals during pad changes. Replace seals or calipers if they leak or stick.
  • Keep brake components free of oil and grease — contamination reduces friction and increases stopping distance.

Warnings & safety reminders

  • Never reuse drained brake fluid. Dispose of it per local hazardous-waste rules.
  • A spongy brake lever after bleeding indicates trapped air or a failing master cylinder; diagnose further before riding aggressively.
  • Avoid getting brake fluid on painted surfaces; it damages finishes. Rinse immediately with water and clean thoroughly if contact occurs.
  • Do not confuse power steering fluid with brake fluid; they are different systems and incompatible.

Following this MotoSport-specific procedure will give you a clean, properly bled brake system on your 2012 Suzuki King Quad 750AXi 4X4 POWER STEERING. If you find damaged hoses, corroded lines, or persistent brake softness, replace the faulty parts before returning the ATV to service.

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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.