How to bleed and replace brake fluid on a 2020 Can-Am Outlander 850 X MR

Shop parts for a 2020 Can-Am Outlander 850 X MR ATV.

This step-by-step MotoSport guide covers safely flushing and replacing brake fluid on a 2020 Can-Am Outlander 850 X MR. Procedures below assume a mechanically sound braking system and concentrate on fluid replacement and bleeding. If you find damaged lines, worn pads, or corroded components, replace those parts first. Use DOT 4 brake fluid only; do not mix with DOT 5 silicone fluid.

What you need

  • Fresh DOT 4 brake fluid (manufacturer-recommended quality)
  • Brake bleeder kit (vacuum or pressure bleeder) or clear tubing and a catch bottle
  • Wrenches to fit bleeder nipples (often 8 or 10 mm)
  • Clean rags, shop towels, and isopropyl alcohol for cleaning
  • Gloves and safety glasses
  • Torque wrench (for reassembly where applicable)
  • Container to collect old fluid for proper disposal

Safety & prep

  • Work on a cool machine parked on a level surface with the parking brake engaged and the engine off.
  • Avoid spilling brake fluid on painted plastics – it damages finish. Wipe any spills immediately with a damp cloth and isopropyl alcohol.
  • Wear eye protection and gloves; brake fluid is corrosive to skin and eyes.
  • Keep the reservoir cap and surrounding area clean to prevent contamination.

Model notes for the 2020 Can-Am Outlander 850 X MR

  • The Outlander 850 X MR uses a combined front/rear master cylinder and hydraulic lines routed for aggressive off-road use. Lines can be routed near suspension components — inspect for chafing, pinch points, or rock damage before starting.
  • Many X MR models have heavier-duty calipers and stainless-steel braided lines from the factory or common aftermarket upgrades; braided lines reduce expansion but still require periodic fluid changes to maintain performance.
  • If your machine is equipped with any factory or aftermarket ABS or traction control hardware, follow brake-system specific bleeding procedures found in the factory manual for those systems. If uncertain whether your machine has ABS, inspect for wheel speed sensors near the hubs.
  • Because the Outlander sees mud and water frequently, check wheel hub seals and caliper piston boots for contamination while bleeding. Replace any compromised components to prevent water ingress into brake fluid.

General bleed order

Bleed starting with the caliper farthest from the master cylinder and move toward the nearest. If uncertain of the master cylinder location, visually trace the brake lines from the handlebar reservoir. Typical order: far rear, near rear, far front, near front. On many ATVs the sequence is rear-right, rear-left, front-right, front-left but always confirm on your machine by tracing the lines.

Step-by-step: reservoir flush & bleed (two-person method)

  1. Remove the reservoir cap and diaphragm. Clean the reservoir top to prevent dirt entering the system.
  2. Siphon out old fluid from the reservoir until fluid level is low but you can still see connections. Refill with fresh DOT 4 to the minimum mark; keep cap off during bleeding but do not let level drop below minimum.
  3. Start with the farthest caliper. Have an assistant pump the brake lever/pedal several times and hold firm.
  4. Open the bleeder nipple one to two full turns until fluid and bubbles flow; close nipple before the assistant releases the lever/pedal. Repeat until clear, bubble-free fluid flows and no air is visible.
  5. Top off the reservoir as needed during the process to prevent air entering the master cylinder.
  6. Proceed to the next caliper in the bleed order. Repeat steps until all calipers are clear.
  7. After final caliper, pump lever/pedal to build pressure and check for a firm feel. Recheck reservoir level and tighten the cap securely.
  8. Clean any spilled fluid and test-ride slowly to confirm braking performance. Recheck for leaks and re-torque bleed nipples to specification if available.

Step-by-step: vacuum or pressure bleeder (single-operator)

  1. Connect the vacuum hose to the bleeder nipple and the vacuum pump, or attach a pressure bleeder to the reservoir per tool instructions.
  2. Fill the reservoir with fresh DOT 4 and maintain recommended pressure on a pressure bleeder (do not exceed manufacturer guidance).
  3. Open the farthest bleeder nipple and allow fluid to run until clear and bubble-free. Close nipple, then move to the next caliper.
  4. Keep reservoir topped and dust cap on when finished. Confirm pedal/lever firmness and inspect for leaks.

Master cylinder full flush (recommended every 1-2 years)

  • To fully replace old fluid from the master cylinder, repeat the bleed cycle while emptying and refilling the reservoir several times until fresh fluid flows from each bleed port.
  • If the master cylinder has a removable reservoir or internal check valves, inspect seals and clean the area; replace any worn components.

Common issues & troubleshooting

  • Spongy lever/pedal after bleeding: likely remaining air. Repeat bleeding sequence, prioritizing the caliper nearest the master cylinder last.
  • Persistent soft pedal with no visible air: check for leaks, collapsed hoses, or a worn master cylinder.
  • Brake drag after bleeding: check caliper pistons for corrosion or debris, ensure bleeder nipples are fully closed, and verify caliper slide pins move freely.
  • Contaminated fluid (discolored or milky): indicates moisture or contamination — flush fully and replace lines or components if fluid contamination is severe.

Final checks before riding

  • Verify all bleeder nipples & reservoir cap are tightened and secure.
  • Confirm brake lever/pedal feel is firm and consistent.
  • Inspect all hoses, fittings, and calipers for leaks during a low-speed brake test.
  • Dispose of old brake fluid responsibly at an approved recycling facility.

Keep a maintenance log for your Outlander 850 X MR noting fluid change dates and mileage. Regular brake fluid replacement preserves corrosion resistance and braking consistency in demanding off-road conditions.

Related Shopping Categories

Shop Brake Fluid for a 2020 Can-Am Outlander 850 X MR ATV.

Shop Brake Bleeders for a 2020 Can-Am Outlander 850 X MR ATV.

Shop Brake Pads for a 2020 Can-Am Outlander 850 X MR ATV.

Shop Brake Lines for a 2020 Can-Am Outlander 850 X MR ATV.

Shop Brake Tools for a 2020 Can-Am Outlander 850 X MR 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.