How to Bleed and Replace Brake Fluid on a 2021 Suzuki King Quad 500AXi 4X4 POWER STEERING

Shop parts for a 2021 Suzuki King Quad 500AXi 4X4 POWER STEERING ATV.

This MotoSport-exclusive guide walks you through safely replacing and bleeding the brake fluid on a 2021 Suzuki King Quad 500AXi 4X4 POWER STEERING (MMY code KINGQD500P). Follow these steps precisely to maintain braking performance and reliability.

What you need

  • DOT 4 brake fluid (Suzuki recommends DOT 4; always verify reservoir cap marking)
  • Brake-bleeding kit: clear tubing, catch bottle, one-way valve or vacuum pump (hand or electric)
  • Turkey baster or fluid syringe
  • Open-end wrench for bleeder nipples (typically 8 or 10 mm)
  • Phillips and flat screwdrivers, rags, nitrile gloves, safety glasses
  • Torque wrench for caliper pin bolts if removed
  • Hydraulic jack or ramps and wheel chocks (if needed to access calipers)
  • Waste container for used brake fluid

Safety & model notes

  • Brake fluid is highly corrosive to paint and plastics. Protect painted surfaces and clean all spills immediately.
  • The King Quad 500AXi POWER STEERING has separate front and rear hydraulic brake circuits with a shared reservoir. Do not mix DOT 4 with DOT 5 silicone fluid.
  • This model uses hand lever for front brakes and foot pedal for rear; both circuits should be bled until fluid runs clear without air.
  • If the machine has an aftermarket brake master cylinder or ABS/combined braking modifications, follow manufacturer-specific procedures. For stock machines, standard bench/pressure/vacuum bleeding methods apply.
  • If brake pedal or lever travel is excessive after bleeding, inspect master cylinder, calipers, hoses and pads for wear or leaks before riding.

Preparation

  1. Park the ATV on level ground, engage park or put in gear, and chock the wheels. Disconnect the battery negative terminal if you will be working near electrical components.
  2. Clean the brake fluid reservoir cap area to prevent contamination. Remove reservoir cap and diaphragm, noting fluid level and color.
  3. Use a turkey baster or syringe to remove most old fluid from the reservoir. Do not let the reservoir run dry during bleeding.
  4. Top the reservoir with fresh DOT 4 fluid to the MIN line and reinstall the cap loosely so it can vent.
  5. Identify bleeder nipples on each caliper. Keep a rag under each nipple to catch drips and protect paint.

Bleeding order (recommended for King Quad 500AXi)

Bleed starting with the caliper farthest from the master cylinder and finish with the closest. Typical order:

  1. Rear caliper opposite the master cylinder side (usually right rear)
  2. Rear caliper same side (left rear)
  3. Front caliper opposite side (right front)
  4. Front caliper same side (left front)

Bleeding procedure vacuum or manual (single-operator) method

  1. Attach clear tubing to the bleeder nipple and submerge the other end in a catch bottle partially filled with fresh fluid to prevent air re-entry.
  2. Have an assistant slowly depress the brake pedal (rear) or lever (front) several times and hold at the bottom while you open the bleeder nipple about 1/4 turn. If using a vacuum pump, draw until fluid with no bubbles comes through.
  3. Tighten the bleeder nipple before the assistant releases the pedal/lever. Repeat until no air bubbles appear and fluid is clean and clear.
  4. Keep reservoir topped between cycles to avoid introducing air into the master cylinder.
  5. Work through the bleeding order until all four calipers produce clear, bubble-free fluid and pedal/lever feel firm.
  6. After final caliper is bled, pump the brake lever/pedal to confirm firmness, then torque bleeder nipples snug (do not over-torque) and clean any spilled fluid.

Bleeding procedure pressure/bench method (two-operator alternative)

If you have a pressure bleeder: attach it to the reservoir, pressurize per tool instructions, then open bleeder nipples in the same far-to-near sequence until clear fluid flows. Maintain reservoir level and release system pressure before removing the tool.

Full fluid replacement / flushing the system

  1. To fully replace old fluid, repeat bleeding until the fluid exiting the calipers matches the new fluid in color and appearance.
  2. For heavy contamination or moisture, multiple reservoir refills and complete bleeding cycles may be necessary.

Post-bleed checks

  • Confirm reservoir level is at the MAX or between MIN and MAX as specified, then reinstall cap and diaphragm securely.
  • Check for leaks at bleeder nipples, caliper seals, lines and fittings. Inspect hose condition and replace cracked or soft hoses.
  • Spin wheels and verify brake engagement is smooth with no grabbing or noise. Road-test at low speed in a safe area to confirm braking performance.
  • Dispose of used brake fluid responsibly at a recycling facility or hazardous-waste drop-off.

Torque & maintenance tips specific to the 2021 King Quad 500AXi

  • If you remove caliper mounting bolts, clean threads and torque to manufacturer specsdo not ride until fasteners are torqued correctly. If you don't have the exact spec on hand, tighten to a secure, manufacturer-recommended value from your manual or MotoSport service resources.
  • Inspect brake pads and rotors for thickness and scoring while bleeding; replace pads if less than half their original thickness or if glazing/contamination is present.
  • The power steering system on this King Quad shares no components with the brake hydraulics, but closely inspect the front-end when working in that area to avoid hose routing interference.
  • Regularly replace brake fluid every 1-2 years depending on use and environment to prevent moisture buildup and reduced boiling point.

Troubleshooting

  • Spongy pedal/lever after bleeding: likely remaining air or a leaking component. Recheck bleeder nipples and hoses; perform another full bleed.
  • Brake drag after bleeding: caliper piston may be sticking or pads too tight. Retract piston slightly and check caliper sliding pins for lubrication or corrosion.
  • Persistent loss of fluid or pressure: inspect master cylinder, lines and calipers for leaks; replace faulty parts before riding.

Performing a careful flush and bleed restores braking reliability and safety on your 2021 Suzuki King Quad 500AXi. When in doubt about component condition or torque specifications, consult your factory service manual or trusted MotoSport technicians for model-specific support.

Related Shopping Categories

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Shop Brake Tools for a 2021 Suzuki King Quad 500AXi 4X4 POWER STEERING 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.