How to Bleed & Replace Brake Fluid on a 2016 Polaris Scrambler 850

Shop parts for a 2016 Polaris SCRAM850 ATV.

This MotoSport guide walks you through safely flushing and replacing the brake fluid on a 2016 Polaris Scrambler 850. Follow every step carefully & use the recommended fluid and procedures for a reliable brake system.

Notes specific to the 2016 Polaris Scrambler 850

  • The factory brake system uses DOT 4 brake fluid. Use fresh DOT 4 only; never mix with DOT 5 silicone fluid.
  • The Scrambler 850 has a single master cylinder reservoir that feeds front & rear circuits; locate the reservoir under the front plastics near the handlebars.
  • Some model-year variants may have ABS or electronic controls. If your machine has ABS, consult the service manual for ABS-specific bleed steps or use a scan tool to cycle the pump during bleeding.
  • Brake lines and caliper bleed nipples are steel; inspect for corrosion or damaged rubber hoses while servicing.

Tools & materials

  • DOT 4 brake fluid (fresh, unopened)
  • Clear vinyl tubing to fit bleed nipple
  • Catch bottle with a one-way fluid return or small reservoir
  • Brake bleeder vacuum pump or a helper for manual pumping
  • Wrenches to fit bleed nipples (usually 8mm or 10mm)
  • Turkey baster or fluid siphon
  • Brake cleaner, shop rags, gloves & safety glasses
  • Torque wrench (for caliper hardware if removed)

Safety & prep

  • Work on a level surface, engine off, key removed. Secure the ATV on stands so wheels are off the ground and cannot move.
  • Wear gloves & eye protection. Brake fluid damages painted surfaces & plastics — cover surrounding areas and immediately wipe any spills with brake cleaner.
  • Keep the brake fluid reservoir cap closed except when adding fluid to avoid contamination and moisture absorption.

Step-by-step bleed & replace procedure

  1. Clean the reservoir area thoroughly. Remove the master cylinder cap and diaphragm. Use a turkey baster to remove as much old fluid from the reservoir as possible.
  2. Top reservoir with fresh DOT 4 brake fluid to the maximum mark. Keep the cap nearby but do not seal it yet; air must escape during bleeding.
  3. Locate the bleed nipples on each caliper. Identify circuit order — start bleeding at the wheel farthest from the master cylinder and work toward the closest. Typical order: far rear, near rear, far front, near front. If uncertain, determine master-cylinder outlet positions visually and pick the farthest wheel first.
  4. Attach clear tubing to the first bleed nipple and submerge the other end in a small catch bottle partially filled with fresh fluid to prevent air being drawn back into the system.
  5. Vacuum-bleeder method (preferred): Attach the vacuum pump to the bleed nipple, set it to draw a moderate vacuum, open the nipple, and let fluid flow until clear, bubble-free fluid appears. Close the nipple, release vacuum, remove hose, then repeat for each wheel. Keep the reservoir topped off between wheels.
  6. Two-person/manual pump method: With helper sitting on the seat to apply light pressure to the brake lever/pedal, have the helper slowly depress the lever several times and hold it. Open the bleed nipple about 1/4 turn to let fluid and air escape into the tubing until flow slows. Close the nipple before the helper releases the lever. Repeat until only clear, bubble-free fluid exits. Keep the reservoir topped off throughout.
  7. After each wheel, tighten the bleed nipple to snug (do not over-torque). Check the reservoir fluid level and refill to the max mark before moving to the next wheel.
  8. When all wheels are bled, perform a final check: with the ATV supported and wheels free, pump the brake lever/pedal to build firm pressure. Inspect for leaks, tighten any loose fittings, and top off the reservoir to the correct level. Reinstall diaphragm & cap securely.
  9. Lower the ATV, test brakes at low speed in a safe area to verify firm, consistent braking. Recheck fluid level after a short test ride and inspect around calipers, lines & master cylinder for leaks.

Additional model-specific inspection points

  • Check caliper pins and slides for corrosion — clean and lubricate with brake-compatible grease if serviceable.
  • Inspect brake pads for even wear. A Scrambler 850 with lifted or heavy-use setups may need pads replaced more frequently.
  • Inspect brake hose fittings at the chassis for chafing or rubbing against frame plastics; secure loose routing to prevent wear.
  • If you find persistent sponginess after bleeding, suspect air trapped in ABS modulators (if equipped) or a failing master cylinder. Follow ABS bleed procedures or replace the master cylinder as required.

Disposal & final tips

  • Drain and used brake fluid is hazardous waste. Dispose of it at a local hazardous-waste facility or authorized recycling center.
  • Record the service date and fluid type in your maintenance log. Brake fluid should typically be replaced every 1-2 years depending on use and storage conditions.
  • If you prefer a faster, cleaner job, MotoSport can help you find the correct replacement parts & bleeder tools for your 2016 Polaris Scrambler 850.

Related Shopping Categories

Shop Brake Fluid for a 2016 Polaris SCRAM850 ATV.

Shop Brake Bleeders for a 2016 Polaris SCRAM850 ATV.

Shop Brake Pads for a 2016 Polaris SCRAM850 ATV.

Shop Brake Lines for a 2016 Polaris SCRAM850 ATV.

Shop Brake Tools for a 2016 Polaris SCRAM850 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.