How to Bleed & Replace Brake Fluid on a 2007 Suzuki Eiger 400 4X4 AUTO

Shop parts for a 2007 Suzuki Eiger 400 4X4 AUTO ATV.

This MotoSport proprietary guide shows a step-by-step, model-specific procedure for flushing and bleeding the hydraulic brakes on a 2007 Suzuki Eiger 400 4X4 AUTO. Follow these instructions carefully to restore firm pedal feel and safe stopping performance. If you are not comfortable with brake work, have a qualified mechanic perform the service.

Notes specific to the 2007 Suzuki Eiger 400 4X4 AUTO

  • The Eiger 400 AUTO uses a simple hydraulic system with a master cylinder and hydraulic calipers front and rear; no factory ABS. Confirm fluid spec in your owner's manual but Suzuki commonly specifies DOT 4 brake fluid for this model. Do not mix DOT3 and DOT4 unless the manual allows it.
  • The brake fluid reservoir is translucent and mounted on the master cylinder near the handlebars for the front brake and near the rear brake pedal for the rear system. The plastic is sensitive to brake fluid — avoid spills on painted and plastic surfaces.
  • This model is an automatic (CVT) — put the machine in park or neutral and engage the parking brake; place wheel chocks under wheels and work on level ground.
  • Brake system components are compact; allow clearance for the caliper bleed nipples and for the reservoir cap. Inspect hoses for age cracks/softening while you're working.

Tools & supplies

  • DOT 4 brake fluid (or the spec listed in your manual)
  • Clear hose that fits the bleed nipple
  • Catch bottle partially filled with old fluid (for submerging hose end)
  • Wrench for bleed nipples (commonly 8mm or 10mm) confirm size
  • Vacuum bleeder or hand pump (optional but speeds bleeding and reduces air ingress)
  • Turkey baster or syringe to remove old fluid from reservoir
  • Clean rags, shop towels, nitrile gloves, safety glasses
  • Torque wrench (for caliper/reinstall if removed)
  • Brake parts cleaner and a small container for disposal

Preparation

  1. Park the Eiger on level ground, set parking brake, and chock wheels. Place machine on center stand if available for stable access.
  2. Clean around the reservoir cap(s) to prevent contamination when you open them. Remove cap and rubber diaphragm. If the fluid is dark or contaminated, it will need a full flush.
  3. If you will flush both front and rear circuits, identify which caliper is farthest from the master cylinder. Typically work from the farthest to the nearest to minimize trapped air.
  4. Loosen but do not remove the bleed nipples to confirm fitment and access. Fit clear hose onto the nipple and submerge the other end in the catch bottle partially filled with old fluid to prevent air re-entry.

Method A Two-person pump-and-release bleeding (standard)

  1. Top off reservoir to the max line with fresh DOT 4 fluid.
  2. Start with the caliper farthest from the master cylinder. Have helper slowly pump the brake lever or pedal several times and hold pressure (do not lock the lever).
  3. Open the bleed nipple about 1/4 turn; old fluid and bubbles will flow through the hose into the bottle. Close the nipple before the helper releases pressure. Repeat until fluid runs clear with no bubbles.
  4. Keep the reservoir level topped off during the process to avoid drawing air into the master cylinder.
  5. Repeat for the next-farthest caliper and finish with the caliper closest to the master cylinder.
  6. After final bleed, ensure nipples are tightened to correct snugness. Wipe any spilled fluid immediately and reinstall caps and diaphragms.

Method B Vacuum or pressure bleeding (recommended for a cleaner single-operator job)

  1. Attach vacuum pump hose to the bleed nipple, submerge hose end in the catch bottle, open the nipple, and draw fluid until it runs clear and bubble-free. Close nipple before releasing vacuum. Keep reservoir topped.
  2. For a pressure bleeder, pressurize the reservoir per tool instructions and open bleed nipples one at a time until clear fluid appears. Follow tool safety guidelines.

Complete fluid replacement (full system flush)

  1. Use a syringe or turkey baster to remove as much old fluid from the reservoir as possible before adding fresh fluid. Refill with new DOT 4 fluid.
  2. Bleed all calipers in the correct sequence until fresh, clear fluid with no air bubbles is coming from each bleed nipple. Continue topping the reservoir as needed.
  3. After bleeding, cycle the brake lever/pedal to confirm a firm feel. If it feels spongy, re-bleed the circuit paying close attention to reservoir level and bleed nipple closure timing.

Post-service checks

  • Ensure bleed nipples are properly tightened but do not over-torque. Check for leaks at nipples, banjo fittings, and hose connections after a short test ride at low speed.
  • Dispose of used brake fluid per local hazardous waste rules. Do not pour down drains or on soil.
  • Inspect brake pads, rotor condition, hose condition, and master cylinder boot while you have access. Replace any soft, cracked hoses or heavily scored rotors.
  • Record service date and fluid type used; recommend re-bleeding or fluid replacement every 1-2 years depending on use and moisture exposure.

Safety & warnings

  • Brake fluid is corrosive to paint and plastics. Protect painted surfaces and immediately wash any spills with water.
  • Use only the fluid grade specified by Suzuki for this model. Mixing incompatible fluids can damage seals and reduce braking performance.
  • If brakes remain soft after thorough bleeding, investigate for a leaking master cylinder, collapsed hose, or internally leaking caliper piston rather than repeating the same bleeding routine.

Perform this service with care and test brakes in a controlled area before returning to normal riding. For parts, hardware, or replacement components specifically for the 2007 Suzuki Eiger 400 4X4 AUTO, trust MotoSport for fitment and inventory.

Related Shopping Categories

Shop Brake Fluid for a 2007 Suzuki Eiger 400 4X4 AUTO ATV.

Shop Brake Bleeders for a 2007 Suzuki Eiger 400 4X4 AUTO ATV.

Shop Brake Pads for a 2007 Suzuki Eiger 400 4X4 AUTO ATV.

Shop Brake Lines for a 2007 Suzuki Eiger 400 4X4 AUTO ATV.

Shop Brake Tools for a 2007 Suzuki Eiger 400 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.