How to Bleed and Replace Brake Fluid on a 2013 Suzuki King Quad 400FSi 4X4 AUTO

Shop parts for a 2013 Suzuki King Quad 400FSi 4X4 AUTO ATV.

This MotoSport.com guide walks you through a professional, safe brake fluid change and bleeding procedure specific to the 2013 Suzuki King Quad 400FSi 4X4 AUTO. Follow every step and use only compatible fluids and fresh hardware to protect the hydraulic system and braking performance.

Model notes you should know about the 2013 King Quad 400FSi

  • The King Quad 400FSi is fuel-injected (FSi) with an automatic transmission and a compact ATV chassis. Brake components are accessible but often tucked close to the frame ‐ plan for some disassembly or wheel removal for best access.
  • Brake fluid spec: consult your owner's manual for the official specification. Commonly DOT 3 or DOT 4 is used in Suzuki ATVs. Never mix petroleum-based fluids; use fresh, unopened hydraulic brake fluid that meets the manual's spec.
  • Reservoir locations vary by year and configuration: inspect the front handlebar master cylinder reservoir and the rear brake master cylinder or reservoir under the seat or near the frame. Confirm which circuit feeds which wheel before bleeding.
  • On this model, bleed nipples are on the brake calipers (or rear wheel cylinder). Expect compact bleed nipples requiring a small open-end or flare-nut wrench and possibly removal of bodywork for clearance.
  • Replace any banjo bolt crush washers and cap seals when reassembling to avoid leaks and air ingress.

Tools & supplies

  • Correct DOT brake fluid per owner's manual (use only one type, unopened)
  • Brake bleeder kit (clear tubing and catch bottle) or vacuum pump
  • Small flare-nut/open-end wrench sized to the bleed nipples
  • Clean rags, nitrile gloves, safety glasses
  • Jack or stands (if wheel removal required)
  • New crush washers for banjo bolts (if you open lines)
  • Shop manual or service spec sheet for bleed order and torque values

Safety first

  • Work on a level surface with the engine off, parking brake applied or wheels chocked.
  • Brake fluid damages paint & plastics – protect painted surfaces and immediately wipe spills with water.
  • Do not let the master cylinder reservoir run dry — air in the system will require extra bleeding.

Procedure overview

  1. Preparation
    • Locate both master cylinder reservoirs (front handlebar and rear, if separate). Clean the reservoir caps before opening.
    • Remove any body panels or wheels necessary to access bleed nipples and calipers.
    • Top the reservoir(s) to the maximum mark with fresh fluid. Leave caps loosely in place to limit contamination while you prepare lines.
  2. Determine bleed order
    • Identify which master feeds which wheel. A common approach: bleed the wheel farthest from the master reservoir first, then progress to the closest. For a single master feeding multiple calipers, typical order is: furthest rear wheel, nearest rear wheel, furthest front wheel, nearest front wheel. Adjust if your master location differs.
  3. Basic gravity or pedal-assisted method (no vacuum pump)
    • Have an assistant slowly depress the brake lever or pedal to roughly half travel and hold it.
    • Open the furthest bleed nipple about 1/4 turn. Attach clear tubing from the nipple into a catch bottle partially filled with fresh fluid (to prevent air return).
    • Fluid and bubbles will flow into the bottle. Close the nipple before the assistant releases the lever/pedal. Repeat until no bubbles appear and fluid is clear.
    • Top the reservoir after each wheel and before moving to the next to prevent the reservoir running dry.
    • Work through the bleed order until all circuits are bubble-free and pedal/lever feel firm.
  4. Vacuum or pressure method (recommended for faster, cleaner bleeding)
    • Attach vacuum pump to each bleed nipple in turn, pull fluid until clear, then tighten the nipple and move to the next wheel. Keep reservoir topped between wheels.
    • Alternatively, a pressure bleeder can be used on the master reservoir to push fluid through the system — follow the tool instructions and never exceed recommended pressure.
  5. Bench-bleeding a replacement master cylinder or after major service
    • If you replace the master cylinder, bench-bleed it before installation using the factory-specified fittings or tubing until all air is removed.
  6. Final checks
    • Confirm all bleed nipples and reservoir caps are tightened to spec. Wipe any spilled fluid and inspect for leaks.
    • Pump the brake pedal/lever several times to verify firm, consistent feel and return to normal travel.
    • Test ride at low speed in a safe area to confirm braking performance before normal operation.

Common issues & troubleshooting

  • Spongy pedal after bleeding: likely air still in system or reservoir was allowed to run dry. Repeat bleeding sequence, paying special attention to the furthest calipers.
  • Persistent leaks at banjo bolts or fittings: replace crush washers and torque to spec; do not reuse old washers.
  • Contaminated or dark fluid: replace completely with fresh fluid by repeated flushes until the outflow is clear.
  • Stuck caliper pistons: they can trap air and slow bleeding. Remove caliper, clean, and carefully retract pistons before bleeding if necessary.

Torque & replacement parts notes

  • Always replace crush washers on banjo bolts when any line is opened. Use OEM or equivalent quality parts.
  • Refer to your MotoSport service spec sheet or Suzuki shop manual for specific torque values on bleed nipples and banjo bolts. If unsure, tighten snugly and confirm no leaks; do not over-torque fragile fittings.

Maintenance interval recommendation

For reliable performance, replace brake fluid every 1-2 years or sooner if contaminated, and inspect the system each season. Old fluid absorbs moisture which reduces boiling point and can harm metal components.

Following this MotoSport.com procedure will restore the braking feel and safety of your 2013 Suzuki King Quad 400FSi 4X4 AUTO. If you encounter persistent problems or internal master cylinder/caliper failures, consult a certified technician.

Related Shopping Categories

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Shop Brake Tools for a 2013 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.