How to Bleed and Replace Brake Fluid on a 2006 Polaris Sawtooth

Shop parts for a 2006 Polaris Sawtooth ATV.

This MotoSport service guide walks you through safely flushing old brake fluid and bleeding the brake system on a 2006 Polaris Sawtooth ATV. The Sawtooth uses a hydraulic brake system with a compact master cylinder and front/rear calipers; routine fluid replacement restores braking performance and prevents internal corrosion. Read the entire procedure before beginning and follow all safety cautions.

What you’ll need

  • DOT 4 brake fluid (Polaris recommends DOT 4; DOT 3 is compatible but DOT 4 has higher boiling point)
  • Brake bleeder kit or clear tubing and a catch bottle
  • Turkey baster or fluid syringe
  • 7, 8, 10 mm wrench set (banjo bolt common sizes; check your hardware)
  • Hex/Allen set (if caliper bleed nipples use Allen)
  • Torque wrench (capable of low ft-lb range)
  • Clean rags, nitrile gloves, safety glasses
  • Paper towels or shop towels and isopropyl alcohol for cleanup
  • New crush washers for banjo fittings (recommended) and replacement bleed nipple gaskets if worn

Safety first

  • Work on a flat, stable surface with the ATV in Park and engine off. Chock wheels to prevent movement.
  • Brake fluid is corrosive to paint & plastics. Avoid spills and wipe immediately with water & clean cloths.
  • Use gloves & eye protection. Dispose of old fluid per local regulationsdo not pour down drains.

Model notes for the 2006 Polaris Sawtooth

  • 2006 Sawtooth models typically do not have ABS; bleeding is conventional: master cylinder reservoir — lines — calipers.
  • Reservoir orientation is compact and sometimes under a plastic cover; remove plastics carefully to avoid damaging clips.
  • Banjo bolts on calipers often use copper crush washers — replace these whenever the line is disturbed to ensure leak-free sealing.
  • Some Sawtooth units have a combined front-caliper setup; identify left/right bleed nipples to ensure complete evacuation of air pockets.
  • If your Sawtooth shows spongy lever/pedal feel after bleeding, check flexible hoses for internal collapse or swelling — replace aged hoses.

Preparation

  1. Park the ATV on level ground, engage parking brake or shift into Park, and chock rear wheels.
  2. Remove any plastic covers blocking access to the master cylinder and calipers. Keep fasteners in a tray.
  3. Clean the area around the master cylinder reservoir cap to prevent contamination.
  4. Unscrew the reservoir cap and diaphragm slowly. Use a turkey baster to remove old fluid from the reservoir to the lowest practical level.
  5. Refill the reservoir with fresh DOT 4 fluid just above the minimum line. Replace cap loosely for now.

Bleeding methods (choose one)

Option A — Two-person manual bleed (recommended for best control)

  1. Have an assistant slowly depress and hold the brake lever/pedal.
  2. Attach clear tubing to the lowest caliper bleed nipple and submerge the other end in a catch bottle part-filled with fresh brake fluid to prevent air re-entry.
  3. Open the bleed nipple 1/4 to 1/2 turn with the proper wrench. Fluid and bubbles will flow into the tubing. Close the nipple before the assistant releases the lever/pedal.
  4. Repeat: pump/hold — open nipple — close nipple — release. Keep checking reservoir fluid level and top as needed to avoid running dry (air entry). Continue until clear fluid with no bubbles exits.
  5. Tighten the bleed nipple to spec (snug; typically 8-12 ft-lb depending on hardware) and wipe clean.
  6. Repeat for the other caliper(s) following the sequence: farthest from master cylinder first (usually rear caliper, then front calipers left/right as applicable).

Option B — One-person vacuum or pressure bleeder

  1. Connect vacuum bleeder to bleed nipple or attach a pressure bleeder to the master cylinder reservoir per tool instructions.
  2. Open the bleed nipple and draw fluid until clear, bubble-free fluid appears. Keep reservoir topped up.
  3. Close bleed nipple, then move to the next caliper. Follow same farthest-first sequence.

Replacing brake fluid system components (when needed)

  • When replacing lines or removing banjo fittings, replace copper crush washers on each side of the banjo fitting. Torque banjo bolts to a light torque value (generally 7–12 ft-lb); do not overtighten.
  • If master cylinder seals are leaking or sponginess persists after proper bleeding, rebuild or replace the master cylinder assembly with MotoSport-approved parts.
  • Always use fresh DOT 4 fluid from a sealed container. Never mix mineral-oil systems with DOT fluids; Polaris brake systems use DOT fluid only.

Step-by-step complete flush

  1. Drain as much old fluid as possible from the reservoir with syringe/turkey baster. Refill with fresh DOT 4.
  2. Start at the caliper farthest from the master cylinder and work toward the closest. For Sawtooth that usually means rear caliper first, then front calipers.
  3. Bleed each caliper until fluid runs clear and bubble-free. Keep reservoir topped to prevent sucking air into master cylinder.
  4. When finished bleeding all calipers, pump the brake lever/pedal several times to confirm firm, consistent feel. Inspect for leaks at banjo bolts, bleed nipples & hose fittings.
  5. Torque banjo bolts and bleed nipple fittings to specified tightness if you disturbed them. Clean any spilled fluid and reinstall plastic covers.
  6. Dispose of used brake fluid properly. Record service date and mileage for future maintenance.

Troubleshooting

  • Spongy brake lever after bleeding: repeat bleeding sequence, ensure reservoir never ran dry, inspect hoses for internal collapse, check caliper pistons for seizure.
  • Brake lever slowly sinks to handlebar: likely internal master cylinder seal leak — rebuild or replace master cylinder.
  • Persistent leaks at banjo bolt: replace crush washers and retorque; if leak continues, inspect mating surfaces and hose fitting for damage.

Maintenance intervals & final notes

  • For reliable performance replace brake fluid every 1–2 years or sooner if contaminated or discolored.
  • Keep a record of fluid type and service date. Use DOT 4 for the Sawtooth unless local conditions or owner preference specify DOT 3, but avoid mixing incompatible fluids.
  • If you’re unsure about torque values or encounter unusual hardware, use MotoSport replacement parts and consult a trained technician.

Perform all work carefully. If you are not comfortable performing a full brake fluid flush or replacing brake components, have a MotoSport-recommended mechanic service your 2006 Polaris Sawtooth to ensure safe operation.

Related Shopping Categories

Shop Brake Fluid for a 2006 Polaris Sawtooth ATV.

Shop Brake Bleeders for a 2006 Polaris Sawtooth ATV.

Shop Brake Pads for a 2006 Polaris Sawtooth ATV.

Shop Brake Lines for a 2006 Polaris Sawtooth ATV.

Shop Brake Tools for a 2006 Polaris Sawtooth 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.