How to Bleed & Replace Brake Fluid on a 2014 Suzuki King Quad 400FSi 4X4 AUTO

Shop parts for a 2014 Suzuki King Quad 400FSi 4X4 AUTO ATV.

Overview

This MotoSport-exclusive guide covers safely flushing old brake fluid and bleeding the hydraulic system on the 2014 Suzuki King Quad 400FSi 4X4 AUTO. Procedures below assume the stock hydraulic system with hydraulic disc brakes front & rear and a combined master cylinder/reservoir layout. Work on a clean, level surface, and follow basic safety precautions — park in gear, set the parking brake, and disconnect the battery if you will be working near electrical components.

Tools & Materials

  • DOT 3 or DOT 4 brake fluid (use manufacturer-specified DOT rating; Suzuki generally accepts DOT 3 or DOT 4check your owner's manual)
  • Clear vinyl tubing sized to fit bleeder nipples
  • Brake bleeder bottle or clear catch bottle with one-way valve or a syringe
  • Wrench set (bleeder nipple size typically 8mm or 10mm)
  • Turkey baster or fluid syringe to remove old fluid from reservoir
  • Shop rags, isopropyl alcohol for cleaning, and gloves
  • Floor jack or ramps if needed to access calipers; wheel chocks
  • Torque wrench for caliper hardware (spec values per manual)

Model-Specific Notes for the 2014 King Quad 400FSi

  • The King Quad 400FSi uses a semi-integrated brake system with separate front calipers and a rear caliper; there is a single master cylinder reservoir. Keep reservoir capped when not in use to prevent contamination.
  • ABS is not present on this model year; bleeding is straightforward caliper-by-caliper. The ATV uses a hydraulic parking brake linkage on some trim levels — confirm whether your unit has a hydraulic park brake before servicing rear components.
  • Brake lines are routed under the plastics and frame; inspect lines for chafing, corrosion, or split hose ends while servicing. Replace any suspect lines with OEM-equivalent parts available through the MotoSport parts link above.
  • Caliper bleed nipple threads are soft; avoid over-torquing the nipple or the wrench slipping — use a properly fitting wrench and a short, controlled motion.
  • If the unit has been ridden in salt or mud, fully clean the caliper area before opening the system to prevent contamination.

Preparation

  1. Park the ATV on level ground and secure it. Remove the seat and any plastics necessary to access the brake fluid reservoir and calipers.
  2. Clean the reservoir cap area to prevent dirt from entering. Wipe the cap, remove it, then use a turkey baster to remove as much old fluid from the reservoir as possible.
  3. Top the reservoir with fresh DOT-compatible fluid to the maximum mark. Keep the cap loosely reinstalled to minimize dirt ingress while allowing air to escape.
  4. Identify bleed nipples on each caliper. Fit clear tubing onto the nipple and insert the other end into a catch bottle partially filled with fresh fluid to prevent air from being drawn back in.

Bleeding Sequence

Bleed from the furthest caliper from the master cylinder first, then work toward the master cylinder. Typical sequence: right front, left front, rear. If your master cylinder is centrally mounted, follow that rule.

  1. Have an assistant slowly depress the brake lever/pedal while you open and close the caliper bleed nipple. If working solo, use a pressure or vacuum bleeder for a one-person method.
  2. Open the bleeder nipple about a quarter turn. As the lever/pedal is depressed, fluid and air will flow into the tubing. Close the nipple before the lever/pedal is released to avoid drawing air back in.
  3. Repeat until clear, bubble-free fluid runs from the tubing. Keep the reservoir topped up between cycles to prevent the master cylinder from running dry.
  4. Work each caliper in the sequence, ensuring the system is never allowed to run dry at the reservoir.
  5. After final caliper is bled, have the assistant hold the lever/pedal at firm pressure, tighten all bleeder nipples to spec snugness, then slowly release the brake input and check for firmness.

Alternative Methods

If you have a vacuum bleeder or pressure bleeder, attach per tool instructions to the reservoir or master cylinder. Pressure bleeders speed the job and reduce the need for an assistant. Use the tool only with clean, specified brake fluid.

Inspection & Finishing Steps

  • Wipe all fluid spills immediately. Brake fluid damages paint and plastics.
  • Check pedal/lever firmness at rest and under load. A soft or spongy feel indicates remaining air or a leak.
  • Inspect caliper mounting bolts & brake line connections for correct torque and no leaks. Torque to Suzuki specifications or to a snug, manufacturer-recommended value if you don't have the manual available.
  • Clean the reservoir cap gasket and seating surface, then reinstall and secure the cap. Dispose of old fluid according to local regulations.
  • Test ride at low speed in a safe area to confirm braking function before normal use.

Common Troubleshooting

  • Persistent spongy brake feel: re-bleed, inspect for leaks at calipers, hoses, or master cylinder, and check for a collapsed internal hose.
  • Brake drag after bleeding: air trapped in caliper pistons or caliper slides sticking. Retract pistons slightly, clean slides, lube with approved grease, and reassemble.
  • Brake fluid contamination or dark fluid shortly after service: suspect moisture-laden fluid or internal component deterioration; repeat fluid change using unopened fresh fluid.

Safety & Environmental Notes

Brake fluid is hygroscopic — it absorbs moisture over time which reduces boiling point and can cause corrosion. Replace fluid every 1–2 years depending on use and environment. Always store brake fluid sealed and away from heat. Collect and dispose of used fluid responsibly.

Parts & OEM Advice

For replacement hoses, caliper rebuild kits, or master cylinder seals specific to the King Quad 400FSi, use OEM-equivalent parts matched to the 2014 MMY. Using incorrect components can introduce leaks or fitment issues. MotoSport carries Suzuki-fit brake hoses, caliper components, and DOT-rated fluids compatible with this model.

Final Check

Confirm no leaks, verify pedal/lever firmness, re-torque fasteners after test ride if needed, and re-inspect fluid level. Document service date and mileage for future maintenance scheduling.

Related Shopping Categories

Shop Brake Fluid for a 2014 Suzuki King Quad 400FSi 4X4 AUTO ATV.

Shop Brake Bleeders for a 2014 Suzuki King Quad 400FSi 4X4 AUTO ATV.

Shop Brake Pads for a 2014 Suzuki King Quad 400FSi 4X4 AUTO ATV.

Shop Brake Lines for a 2014 Suzuki King Quad 400FSi 4X4 AUTO ATV.

Shop Brake Tools for a 2014 Suzuki King Quad 400FSi 4X4 AUTO 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.