How to Bleed & Replace Brake Fluid on a 2001 Yamaha Bear Tracker

Shop parts for a 2001 Yamaha Bear Tracker ATV.

This proprietary MotoSport guide walks you step-by-step through flushing and replacing the brake fluid on a 2001 Yamaha Bear Tracker. Follow every safety step, confirm fluid spec from your owner's manual, and keep work area clean. If you are not comfortable with brake work, have a professional perform it.

What you need

  • Correct brake fluid (check owner's manual; typically DOT 3 or DOT 4 — use only the type specified)
  • Clear plastic tubing that fits snugly over bleed nipple
  • Catch bottle for old fluid
  • Hand pump vacuum bleeder or pressure bleeder (recommended) or a helper for pedal/lever bleeding
  • Box wrench set sized for bleed nipples
  • Clean rags, gloves, and safety glasses
  • Brake cleaner and a small brush
  • Torque wrench (for caliper/line fasteners if removed) and service manual torque specs

Model notes for the 2001 Yamaha Bear Tracker

  • Confirm whether your unit uses single or dual calipers/wheel cylinders and the location of the master cylinder — familiarity saves time.
  • DOT fluid will damage paint and plastics. Protect painted surfaces and clean spills immediately with brake cleaner.
  • Older machines can have brittle rubber lines; inspect hoses and banjo fittings for cracks or leaks while you work. Replace lines showing age rather than risk contamination.
  • If your Bear Tracker has been stored long periods, inspect master cylinder reservoir for corrosion or internal seals deterioration — a rebuild kit may be required.
  • Always bleed brakes after replacing fluid, replacing pads/shoes, or any time air may have entered the system.

Preparation

  1. Park on a level surface and secure the ATV against movement. Remove the key and disconnect battery ground to avoid accidental starts.
  2. Clean the master cylinder reservoir cap area before opening to prevent contamination. Remove cap and diaphragm; note fluid level and color.
  3. Lift the necessary wheel(s) to access bleed nipples. Support wheels safely on stands.
  4. Identify bleed sequence: start with the wheel farthest from the master cylinder and finish with the closest. If unsure, start with rear then front, or follow the sequence in your service manual.

Complete fluid replacement — recommended method (vacuum or pressure bleeder)

  1. Fill a clean pressure bleeder or the master cylinder reservoir with fresh, correct-spec brake fluid. Keep reservoir topped during the process to avoid drawing air.
  2. Attach clear tubing to the furthest bleed nipple and submerge the other end into a catch bottle partially filled with fresh fluid to prevent air re-entry.
  3. Open the bleed nipple one quarter to one half turn. If using a pressure bleeder, pressurize per unit instructions and allow the fluid to push old fluid and air out. If using a vacuum pump at the caliper, pull through until clear fluid runs with no bubbles.
  4. Close the bleed nipple before releasing pressure (pressure bleeder) or before disconnecting vacuum. Wipe the nipple and check for leaks.
  5. Repeat for each wheel following the proper sequence. Keep reservoir level well above the minimum during the entire process to prevent suctioning air into the master cylinder.
  6. After all lines are bled, pump the brake lever gently to confirm firm lever/pedal feel. If soft or spongy, repeat bleeding focusing on the master cylinder area to purge trapped air.

Alternative: Manual two-person bleed

  1. One person sits on the ATV to operate the brake lever/pedal; the other manages the bleed nipple and reservoir.
  2. Helper slowly applies the lever/pedal to a firm position and holds it. Open the bleed nipple to release fluid/air, then close it before the lever is released. Repeat until clear, bubble-free fluid flows and the lever feels firm.
  3. Maintain reservoir level throughout.

Master cylinder/hose inspection and replacement tips

  • Inspect reservoir diaphragm and cap for deterioration — replace if brittle or cracked.
  • When replacing hoses or banjo bolts, use new crush washers and tighten to the torque in the service manual. Always re-bleed after any line removal.
  • If master cylinder internal seals are leaking or the lever sinks under load, rebuild or replace the master cylinder.

Finishing steps & verification

  1. Top off reservoir to the correct level and reinstall cap and diaphragm.
  2. Clean all fittings and any spilled fluid. Brake fluid attracts moisture — dispose of old fluid responsibly.
  3. Lower the ATV, torque wheel fasteners to spec, and reconnect battery ground.
  4. Test brake function at low speed in a safe area. Confirm firm, consistent braking and no leaks at calipers, lines, or master cylinder.
  5. Re-check fluid level after a short ride and inspect for leaks again.

Troubleshooting

  • Persistent spongy lever: re-bleed, paying attention to the master cylinder; consider bench-bleeding the master cylinder if air is trapped.
  • Leaking bleed nipple: replace nipple or sealing washer; retighten to spec and re-bleed.
  • Contaminated fluid (dark, dirty, or watery): flush completely and replace all fluid; consider replacing rubber hoses if contamination is severe.

Keep a maintenance log noting fluid type, date, and mileage/hours. Regular brake fluid replacement and inspection will keep your 2001 Yamaha Bear Tracker braking reliably season after season.

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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.