How to Bleed & Replace Brake Fluid on a 2019 Suzuki King Quad 750AXi 4X4 POWER STEERING

Shop parts for a 2019 Suzuki King Quad 750AXi 4X4 POWER STEERING ATV.

This MotoSport guide covers scheduled brake fluid replacement and a full bleed procedure for the 2019 Suzuki King Quad 750AXi 4X4 Power Steering. Follow safe-shop practices – if you are uncomfortable with brake service, hire a certified technician.

What you need

  • Brake fluid: DOT 3 or DOT 4 high-quality, new – use only the grade specified in your owner’s manual.
  • Clear plastic tubing and a catch bottle (for gravity or manual bleed).
  • Wrench to fit bleeder nipples (commonly 8 mm or 10 mm) and a small line wrench.
  • Vacuum or pressure bleeder (optional but recommended for single-person bleeding).
  • Turkey baster or fluid syringe (to remove old fluid from reservoir).
  • Clean rags, brake-clean spray, gloves, eye protection.
  • Jack or ramps and block stands if needed to lift the vehicle safely.

Model-specific notes for the 2019 King Quad 750AXi Power Steering

  • This King Quad uses a single master cylinder feeding front and rear circuits; bleeding order should follow the furthest caliper from the master cylinder first.
  • Power steering system is separate hydraulically — do not mix power steering fluid with brake fluid, and avoid splashing brake fluid on painted surfaces or PS components.
  • Calipers have rubber boots and bleeder nipples mounted on the caliper body; inspect boots and banjo bolts for leaks when servicing.
  • ABS is not standard on this model year — bleeding is straightforward hydraulic lines only. If your machine is factory or dealer-modified with ABS, consult a dealer.
  • Brake hose routing on the King Quad can chafe where it passes tabs on the swingarm and frame; inspect hoses and clips and replace any cracked or swollen hoses during fluid service.

Preparation

  • Park on level ground, engage park/neutral and secure with wheel chocks.
  • Wear gloves & eye protection. Keep rags and a small container of fresh water handy to wash off any fluid spills immediately.
  • Clean the master cylinder reservoir cap area to prevent contamination.
  • Remove about half the old fluid from the reservoir with a turkey baster; dispose of old fluid properly.

Bleeding sequence

For the King Quad 750AXi, use the furthest brake caliper from the master cylinder first, then the next furthest, finishing with the closest. Typical order:

  1. Rear caliper opposite drive side (if applicable) – or rear right if unsure.
  2. Rear caliper same side as drive side (or rear left).
  3. Front caliper furthest from master cylinder (usually right/front).
  4. Front caliper closest to master cylinder (usually left/front).

Step-by-step fluid replacement & bleed

  1. Top the master cylinder with fresh DOT 3 or DOT 4 brake fluid. Do not reuse fluid removed from the system.
  2. Start with the furthest caliper. Place clear tubing over the bleeder nipple and submerge the other end in a bottle containing a bit of new fluid to avoid air ingestion.
  3. If using a helper: have the helper pump the brake lever/pedal slowly 4–6 times and hold pressure on the lever/pedal.
  4. Open the bleeder nipple about a 1/4 turn until fluid flows; close nipple before the helper releases the lever/pedal. Repeat until the fluid runs clear and bubble-free, topping the reservoir as needed.
  5. If using a vacuum or pressure bleeder: attach per tool instructions, run until clear fluid flows and no bubbles appear, then close the bleeder.
  6. Wipe the nipple and torque to specification (snug; avoid over-tightening). Move to the next caliper and repeat the process following the sequence above.
  7. Once all calipers are bled, cycle the brake lever/pedal several times to confirm firm, consistent feel and check for leaks at bleeders, banjo bolts, and hoses.
  8. Ensure the master cylinder reservoir fluid level is at the proper mark, reinstall the cap, and clean any spilled fluid immediately.
  9. Road-test at low speed in a safe area to verify braking performance and recheck for leaks after the test ride.

Additional checks & maintenance tips

  • Inspect rotor thickness and pad wear; replace pads or rotors if worn beyond spec.
  • Replace caliper seals or guide hardware if pistons are sticky or boots are damaged.
  • Always replace rubber hoses that are cracked, soft, or bulging. Age-related hose failure is a common issue on higher-mileage King Quads.
  • Record fluid change date and OE-equivalent fluid type. Brake fluid absorbs moisture over time – replace every 1–2 years or per your maintenance schedule.
  • Dispose of used brake fluid at a hazardous-waste facility; do not pour down drains or on the ground.

Troubleshooting

  • Spongy brake lever after bleeding — repeat bleeding sequence, ensure reservoir never runs low, inspect for hidden air in hoses or compounding leaks.
  • Brake drag after bleed — check caliper pistons and slide pins for corrosion; ensure bleeder nipples are closed tightly and pads retract properly.
  • Persistent leaks — replace the leaking component (hose, banjo fitting, caliper) rather than relying on temporary fixes.

MotoSport recommends using OEM or high-quality aftermarket brake components for the King Quad 750AXi to preserve braking performance and safety. If you’re unsure about fluid grade, torque specs, or a suspected hydraulic fault, consult the factory service manual or a qualified technician.

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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.