How to Bleed & Replace Brake Fluid on a 2008 Suzuki King Quad 750AXi 4X4

Shop parts for a 2008 Suzuki King Quad 750AXi 4X4 ATV.

This MotoSport-exclusive step-by-step guide covers safe, thorough brake fluid replacement and bleeding for the 2008 Suzuki King Quad 750AXi 4X4 (MMY KINGQD750A). Follow these steps carefully, use the correct fluid and tools, and replace sealing crush washers when you open hydraulic banjo fittings.

Tools & supplies

  • DOT 4 brake fluid (Suzuki recommends DOT 4; do not use mineral oil)
  • Brake bleeder kit, clear tubing & catch bottle
  • 10 mm and 12 mm wrenches (bleeder nipples & banjo bolts)
  • Torque wrench (for caliper/banjo bolts)
  • Clean rags, gloves, eye protection
  • Container for old fluid & waste disposal materials
  • Assistant (preferred) or a one-man vacuum/syringe bleeder
  • New copper crush washers for banjo bolts (recommended)

What to know about the 2008 King Quad 750AXi

  • This model uses DOT 4 hydraulic fluid and conventional hydraulic calipers front & rear; there is no factory ABS system to complicate bleeding.
  • Hydraulic lines on this ATV are routed exposed to trail debris & vibration. Inspect hoses, banjo fittings and hose ends for cracking or leaks while you service the fluid.
  • Banjo bolts commonly use replaceable crush washersreuse increases leak risk. Keep spare washers on hand.
  • Corrosion can seize caliper hardware on older machines: penetrate and free bolts gently to avoid rounding heads.
  • Bleed from the furthest caliper from the master cylinder first for quickest, most effective air removal.

Safety & preparatory steps

  • Work on level ground; set parking brake and chock the wheels.
  • Wear eye protection and gloves; brake fluid damages paint.
  • Clean the top of the master cylinder reservoir before opening to avoid contamination.
  • Use only fresh DOT 4 fluid from a sealed container. Never let the reservoir sit open to the atmosphere longer than necessary.

Step 1 – Access and inspect

  • Locate master cylinder reservoir(s). On the King Quad 750AXi there is a front master and a rear/master depending on configuration — confirm which circuit you are servicing.
  • Remove dirt, debris and old fluid from around the cap area. Inspect hoses, caliper boots and fittings for leaks or deterioration.

Step 2 – Drain old fluid

  • Siphon or sponge out as much old fluid from the reservoir as possible to minimize contamination of new fluid.
  • Top up with fresh DOT 4 fluid so the reservoir is near full before beginning to prevent drawing air into the system.

Step 3 – Bleeding order

Always bleed the brake circuit starting with the caliper farthest from the master cylinder and proceed to the closest. Typical order:

  • Front brakes: start with the right front (if farthest), then left front.
  • Rear brake: bleed rear caliper after front circuit if the master is shared; if separate master, treat it as its own circuit and bleed its furthest caliper first.

Step 4 – Bleeding procedure (two-person method)

  1. Have an assistant sit on the ATV and lightly pump the brake lever/pedal several times then hold steady pressure.
  2. Place clear tubing over the caliper bleed nipple and run into a catch bottle partially filled with fresh fluid (prevents air re-entry).
  3. Open the bleed nipple a 1/4 to 1/2 turn and allow fluid & air to flow into the bottle until flow is steady and air-free, then close the nipple while pressure is still applied by your assistant.
  4. Repeat pumping, opening and closing until only clean fluid appears and no air bubbles are visible in the tubing.
  5. Keep the reservoir level topped up between cycles to avoid suctioning air into the master cylinder.

Step 5 – One-person vacuum or syringe method

  • Attach a vacuum bleeder to the bleed nipple, open the nipple, and draw until clean fluid runs out without bubbles.
  • Or use a syringe at the reservoir to push fluid through the lines while opening each bleed nipple in turn until air is gone.
  • Maintain reservoir level throughout the process.

Step 6 – Reassembly & checks

  • When finished, tighten bleed nipples and banjo bolts to proper spec; if unknown, use a torque wrench and consult the factory manual or tighten to a conservative, correct snug value and verify for leaks.
  • Install new crush washers on banjo bolts when disturbing those fittings.
  • Wipe all spilled fluid off painted surfaces immediately and rinse with water if any touch paint.
  • Ensure reservoir cap & diaphragm are seated and secured.

Step 7 – Bedding & test ride

  • Before riding hard, test brakes on stands or slowly at walking speed to confirm firm lever/pedal feel and no leaks.
  • Perform gentle brake applications to bed new fluid — then progressively harder stops to verify proper function.

Maintenance tips & model-specific notes

  • Replace brake fluid every 1-2 years or sooner if exposed to water or frequent heavy use; DOT 4 absorbs moisture and boiling point drops with age.
  • Inspect caliper slide pins and pistons for corrosion; clean and lubricate with manufacturer-approved grease where applicable.
  • Because the King Quad often sees wet, muddy conditions, check for contamination or water intrusion during each service.
  • If you encounter spongy brakes after bleeding and no visible air, inspect master cylinder seals and caliper pistons for leaks or internal bypasses; these components may need service.
  • Keep a set of replacement crush washers and a spare bleeder nipple on hand for trail repairs.

Disposal

Used brake fluid is hazardous. Collect and recycle or dispose of it at an approved facility per local regulations.

Follow these steps carefully for safe, reliable braking on your 2008 Suzuki King Quad 750AXi. If you are unsure at any step, consult a professional mechanic or factory service manual specific to your MMY.

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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.