How to Bleed and Replace Brake Fluid on a 2015 Suzuki King Quad 500AXi 4X4 POWER STEERING
Shop parts for a 2015 SUZUKI KINGQD500P ATV.
This MotoSport guide walks you through safely draining, flushing, and bleeding the brake system on a 2015 Suzuki King Quad 500AXi 4X4 Power Steering. It is written specifically for owners of this MMY ATV and includes model-specific notes and common pitfalls.
Model notes & safety reminders
- The King Quad 500AXi uses a hydraulic brake system; the factory calls for DOT4 brake fluid. Do not substitute DOT3 or DOT5 silicone fluid.
- The power steering on this model is a separate hydraulic circuit. Avoid cross-contamination of brake fluid and power steering fluid; keep reservoirs and lines capped.
- Brake fluid is corrosive to paint and plastics. Protect bodywork – cover panels and wipe spills immediately.
- If calipers, hoses, or the master cylinder show cracking, leaks, or soft lever/pedal feel after bleeding, replace the faulty component rather than repeatedly bleeding.
- Dispose of old fluid according to local hazardous-waste rules.
Tools & supplies
- Fresh DOT4 brake fluid (high-quality, unopened bottle)
- Brake bleeder kit (plastic tubing & clear collection bottle) or vacuum/pressure bleeder
- Wrenches to fit bleed nipples (typically 8mm or 10mm)
- Turkey baster or squeeze bottle (to remove fluid from reservoir)
- Cotton rags, shop towels, rubber gloves, eye protection
- Jack and stands or ramps to lift the ATV safely
Preparation
- Park ATV on level ground, engage parking brake or put in gear, and remove key.
- Raise the ATV so wheels are off the ground if you will check calipers while rotating wheels; support on jack stands placed at frame points.
- Clean around the brake fluid reservoir cap thoroughly before opening to avoid contamination.
- Remove old fluid from the reservoir with a turkey baster until level is low but not dry. Do not let the reservoir run bone-dry if you will pump lines – you must maintain some fluid while replacing to avoid air entry.
- Top reservoir with a small amount of fresh DOT4 fluid so the level covers the pickup; cap loosely for now so you can top as needed while bleeding.
Bleeding strategy & order
Always bleed the line farthest from the master cylinder first and work to the nearest. On the King Quad 500AXi that typically means:
- Rear caliper farthest from master cylinder (usually right/rear)
- Rear caliper nearest master (left/rear)
- Front caliper far side (right/front)
- Front caliper near side (left/front)
If unsure which is farthest, identify the brake master cylinder and follow the longest hose path first.
Bleeding method — manual two-person method
- Fit clear tubing over the bleed nipple and place the other end into a container partially filled with clean brake fluid to prevent air re-entry.
- Have an assistant sit at the brake lever/pedal. Instruct them to slowly apply pressure to the lever/pedal and hold steady while you open the bleed nipple about a quarter to a half turn.
- Fluid and air will flow into the tubing. Close the nipple before the assistant releases pressure to avoid sucking air back in.
- Repeat pump/open/close cycles until the fluid runs clear and bubble-free from that caliper, then tighten the nipple to spec snugness (do not overtighten).
- Top up the reservoir frequently so fluid never drops below the minimum; if it does, you will introduce air into the system and must restart bleeding.
- Move to the next caliper in the bleed order and repeat.
Bleeding method — vacuum or pressure bleeder (recommended solo option)
- Attach the vacuum bleeder to the bleed nipple or connect a pressure bleeder to the master cylinder reservoir per tool instructions.
- Open the bleed nipple and operate the tool until clear, bubble-free fluid flows. Keep reservoir topped with fresh DOT4.
- Close bleed nipple while tool is holding vacuum/pressure to prevent air draw-back.
- Proceed in bleed order until all lines are clear.
Flushing the system vs. partial bleed
For best results and corrosion-prevention, perform a full system flush: keep draining and replacing until the fluid returning from each caliper is clean and free of moisture-darkened color. Partial top-offs mask contamination and shorten component life.
Final checks and reassembly
- After bleeding all wheels, fill the reservoir to the MAX line with fresh DOT4 and securely install the cap.
- With wheels on stands, actuate the brake lever/pedal several times to confirm firm, consistent pressure and check for leaks at nipples, hoses, and calipers.
- Lower the ATV, perform a low-speed brake test in a safe area to confirm proper function before normal riding.
- If brakes feel spongy after correct bleeding, inspect for collapsed hoses, leaky master cylinder, or internal caliper issues.
Torque & hardware notes
- Bleed nipple snug: tighten by hand then a small fraction with a wrench; do not over-torque. If you need a specific torque, consult factory specs or replace damaged nipples.
- Replace any hose showing cracks or swelling. Old rubber hoses can allow air into the system during heavy braking.
Common issues specific to the King Quad 500AXi
- The 500AXi is often trail-used in wet & muddy conditions. Inspect and clean caliper pistons and slider pins before bleeding to avoid contamination and sticking.
- Power steering fluid contamination is possible if fittings are worked on near the steering pump. Always cap components and keep fluids separate.
- If you observe uneven pad wear or dragging after bleeding, remove pads and inspect for seized pistons or corroded pins – cleaning or replacement may be required.
Maintenance interval guidance
Replace brake fluid every 2 years or sooner if the vehicle is used heavily in wet or high-load conditions. Fresh DOT4 reduces boiling risk and maintains braking performance.
Troubleshooting quick reference
- Soft pedal/lever after bleeding: likely air left in system or failing component; re-bleed and inspect master cylinder and hoses.
- Brake drag after bleeding: caliper pistons or slides stuck — clean and lubricate hardware or replace calipers/pins.
- Brake warning or uneven braking: check caliper function and hose condition; replace damaged hoses.
Follow these steps methodically and keep the system topped with fresh DOT4 during the process. If you encounter persistent problems after thorough bleeding, consult a professional mechanic experienced with Suzuki ATVs or bring the unit to a MotoSport service partner.
Related Shopping Categories
Shop Brake Fluid for a 2015 SUZUKI KINGQD500P ATV.
Shop Brake Bleeders for a 2015 SUZUKI KINGQD500P ATV.
Shop Brake Pads for a 2015 SUZUKI KINGQD500P ATV.
Shop Brake Lines for a 2015 SUZUKI KINGQD500P ATV.
Shop Brake Tools for a 2015 SUZUKI KINGQD500P 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.