How to Bleed & Replace Brake Fluid on a 2017 Suzuki King Quad 750AXi 4X4
Shop parts for a 2017 Suzuki King Quad 750AXi 4X4 ATV.
This MotoSport guide walks you through draining, flushing, and bleeding the hydraulic brake system on the 2017 Suzuki King Quad 750AXi 4X4 (MMY code KINGQD750A). Follow safe shop practices, use proper tools and fluids, and observe the model-specific notes below before starting.
Important model notes
- The King Quad 750AXi uses a hydraulic brake system with a single front and rear master cylinder reservoir layout; consult the cap for DOT specification but DOT 4 is commonly specified for Suzuki ATVs. Confirm with your owner’s manual or parts label before use.
- This machine is a 4X4 with independent front brakes and a rear brake circuit; bleeding sequence matters to minimize air retention.
- The King Quad has exposed components prone to contamination from dirt and water — keep the reservoir cap area clean and cover exposed calipers during service.
- If your ATV has a combined parking brake or mechanical shoe components on the rear, inspect them after fluid replacement for signs of contamination or uneven wear.
Tools & materials
- DOT 4 brake fluid (clean, unopened bottle)
- Brake bleeder wrench or appropriate box wrench
- Clear plastic tubing that fits over bleeder nipples
- Catch bottle and a small length of hose inserted into bottle
- Turkey baster or fluid transfer pump
- Clean rags, gloves, eye protection
- Torque wrench for caliper bolts (recommended)
- Jack or ramps and stands to elevate wheels (if needed)
- Assistant for manual bleeding (optional but recommended)
Safety & prep
- Work on a level surface, engine off, parking brake engaged, and battery disconnected if doing extended work near electrical components.
- Keep brake fluid off painted surfaces; it damages plastics and paint. Wipe spills immediately with clean water and rag.
- Never reuse old brake fluid or mix different fluid types. If in doubt, a full system flush is preferable.
Step-by-step: full fluid replacement & bleed
- Clean reservoir area: remove reservoir cap, strainer, and diaphragm. Use a clean cloth to wipe the area to prevent contamination.
- Remove old fluid from reservoir: use a turkey baster or fluid pump to extract as much old fluid as possible into a sealed container for proper disposal. Do not push fluid back into the system.
- Top reservoir with fresh DOT 4 fluid to the fill mark. Replace the cap loosely for now to reduce contamination risk during work.
- Locate bleeder nipples: front calipers (left & right) and rear caliper. On King Quad 750AXi the front calipers are on the left and right suspension knuckles; the rear caliper is mounted at the rear axle housing.
- Bleeding order: start with the caliper farthest from the master cylinder and work toward the nearest. Typical order for this model: rear caliper first (farthest rear), then right front, then left front. If you find the master cylinder location differs, adjust to the farthest-to-nearest logic.
- Attach clear tubing to the bleeder nipple and place the other end into a catch bottle half-filled with fresh fluid to prevent air re-entry.
- Have an assistant slowly depress the brake pedal several times and hold it down. Open the bleeder nipple (~1/4 turn) to allow fluid and air to flow into the tube. Close nipple before the assistant releases the pedal. Repeat until no air bubbles appear. Keep the reservoir topped during the process to prevent new air from entering.
- Repeat step 6 for each caliper following the bleed order. Always check reservoir level frequently and top with fresh fluid as needed.
- Once all lines are bled, tighten all bleeder screws to specification and clean any spilled fluid. Pump the brake pedal; it should be firm and consistent. If the pedal feels spongy, repeat the bleed sequence or consider pressure bleeding.
- After final verification, ensure the reservoir is filled to the proper level, reinstall the diaphragm and cap securely, and torque any removed caliper hardware to spec. Test brakes at low speed in a safe area before normal operation.
Alternative: pressure or vacuum bleeding
If you prefer a single-person method, use a quality vacuum bleeder at each nipple or a pressure bench that pressurizes the reservoir. These tools speed the process and reduce the chance of drawing air back into the system. Follow the tool manufacturer’s directions and keep fluid clean.
Troubleshooting
- Persistent spongy pedal: look for air trapped in hoses, master cylinder internal leaks, or moisture-contaminated fluid. Consider a complete system flush and, if necessary, master cylinder inspection.
- Leaking bleeder or caliper seals: replace seals or the caliper if leaking continues after tightening to spec.
- Brake drag after bleeding: check caliper slide pins, pads, and caliper piston movement; contaminated fluid or collapsed hoses can cause sticking.
Maintenance tips
- Replace brake fluid every 1-2 years or sooner if exposed to water, heavy use, or trail conditions. Moisture lowers boiling point and accelerates corrosion.
- Inspect hoses and banjo fittings for cracks, swelling, or leaks during fluid service; replace as needed with OEM-spec parts.
- Keep a log of service dates and fluid type used. Use only DOT-specified fluids and never mix DOT 3 with DOT 5 silicone fluid.
Parts & replacement items to consider
- Brake fluid (DOT 4)
- Bleeder screws and washers (banjo washers) if corroded
- Caliper rebuild kits or new calipers if pistons or seals are worn
- Brake hoses and fittings if cracked or swollen
Performing a thorough bleed and fluid replacement restores braking performance and extends component life on your King Quad 750AXi. When in doubt about parts or torque specs, refer to factory service data or contact a MotoSport service specialist for model-specific support.
Related Shopping Categories
Shop Brake Fluid for a 2017 Suzuki King Quad 750AXi 4X4 ATV.
Shop Brake Bleeders for a 2017 Suzuki King Quad 750AXi 4X4 ATV.
Shop Brake Pads for a 2017 Suzuki King Quad 750AXi 4X4 ATV.
Shop Brake Lines for a 2017 Suzuki King Quad 750AXi 4X4 ATV.
Shop Brake Tools for a 2017 Suzuki King Quad 750AXi 4X4 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.
