How to Bleed and Replace Brake Fluid on a 2021 Can-Am Outlander 850 X MR
Shop parts for a 2021 Can-Am Outlander 850 X MR ATV.
This guide is proprietary to MotoSport and walks you through safely replacing and bleeding the brake fluid on a 2021 Can-Am Outlander 850 X MR. Follow each step carefully, use DOT4 brake fluid, and take appropriate safety precautions. If your machine is equipped with an ABS system, consult your dealer before beginning; ABS systems can require special procedures.
What you'll need
- DOT4 brake fluid (fresh, unopened)
- Clear hose to fit bleeder nipples
- Catch container for old fluid
- Wrench for bleeder nipples (typically 8 mm)
- Phillips or flat screwdriver for reservoir cap
- Shop rags and brake cleaner
- Rubber gloves and eye protection
- Jack or stands to lift the machine (optional but recommended)
- Assistant OR a vacuum/pressure bleeder
Model-specific notes for the 2021 Outlander 850 X MR
- The Outlander 850 X MR uses hydraulic caliper brakes with a handlebar-mounted front master cylinder and a rear master cylinder/multi-link routing near the foot brake area. Each system has its own reservoir location; the front reservoir is on the right handlebar area, the rear reservoir is mounted on the chassis near the foot controls.
- DOT4 is specified for this model; do not mix DOT3 and DOT5 (silicone) fluids.
- If your unit has an optional ABS or traction-control module, bleeding may need to be done with the ABS unit energized or per factory sequence. If in doubt, contact a dealer.
- Avoid getting brake fluid on painted surfaces or plastic trim – it damages finishes. Keep rags handy and clean spills immediately with water.
Preparation
- Park the machine on level ground, engage park/gear, and set the parking brake. Turn off the engine and remove the key.
- Clean the reservoirs' cap area to prevent contamination. Remove the reservoir caps and diaphragm covers, then note current fluid levels.
- Raise wheels as needed so calipers are accessible and pedals/lever can be operated through full travel.
- Inspect lines, hoses, calipers and banjos for leaks or damage. Replace any suspect parts before bleeding.
General bleeding strategy
Always keep the reservoir(s) topped with fresh DOT4 fluid during the entire procedure to prevent drawing air back into the system. Work on one braking circuit at a time (front then rear or vice versa), and bleed the caliper furthest from the associated master cylinder first, progressing to the closest caliper. If using an assistant, use a firm, consistent pedal/lever stroke; if using a vacuum/pressure bleeder, follow the tool instructions.
Step-by-step bleed and fluid replacement
- Identify which calipers correspond to each reservoir. Front master cylinder controls front calipers; rear reservoir controls the rear caliper(s).
- Start with the circuit farthest from the master cylinder:
- If front system: start with the right front caliper if it is farthest, then left front. If uncertain, follow farthest-to-closest rule by visual routing.
- If rear system: start with the farthest rear caliper from the rear master cylinder, then the closest.
- Attach a clear hose to the caliper bleeder nipple and submerge the other end in a catch bottle containing a little fresh brake fluid (prevents air re-entry).
- Have your assistant slowly pump the brake lever/pedal to about 3/4 travel and hold. Open the bleeder nipple about 1/4 turn to let fluid and air escape. Close the nipple before the assistant releases the lever/pedal. Repeat until no air bubbles appear in the hose and fluid runs clear.
- If you are solo with a vacuum bleeder: attach the vacuum tool to the bleeder nipple, open the nipple, and draw fluid until clear and bubble-free. Close the nipple, then remove the tool.
- Top the reservoir frequently to keep it above the minimum mark. Never let it run dry.
- Proceed to the next caliper in the sequence and repeat until all calipers on that circuit are bubble-free.
- After bleeding calipers, inspect and clean nipples, torque them snugly (do not overtighten) and wipe away any spilled fluid.
- Repeat the entire process for the other brake circuit (if separate front/rear systems), following farthest-to-closest order.
Final checks and road test
- With all calipers bled and reservoir(s) topped to the proper level, reinstall reservoir caps and diaphragms securely.
- Operate the lever/pedal several times to confirm a firm, consistent feel. If the lever/pedal is spongy, repeat bleeding until firm.
- Inspect all connections and lines for leaks while applying steady brake pressure.
- Lower the machine, reinstall wheels if removed, torque wheel fasteners per factory spec, and perform a cautious low-speed test ride in a safe area to confirm stopping power and pedal/lever firmness.
Disposal and maintenance tips
- Dispose of old brake fluid according to local hazardous-waste regulations.
- Replace rubber lines, seals or calipers showing age or swelling. Old fluid absorbs moisture and reduces boiling point — replace every 1–2 years under normal use or sooner for heavy-duty/utility duty use.
- Keep a sealed bottle of DOT4 handy and check reservoir levels before long rides.
- If you encounter persistent air or ABS warnings after bleeding, stop and consult a Can-Am dealer or MotoSport service tech.
Following this MotoSport-only procedure will help ensure your 2021 Can-Am Outlander 850 X MR has reliable braking. If you prefer professional support, schedule service with a qualified technician.
Related Shopping Categories
Shop Brake Fluid for a 2021 Can-Am Outlander 850 X MR ATV.
Shop Brake Bleeders for a 2021 Can-Am Outlander 850 X MR ATV.
Shop Brake Pads for a 2021 Can-Am Outlander 850 X MR ATV.
Shop Brake Lines for a 2021 Can-Am Outlander 850 X MR ATV.
Shop Brake Tools for a 2021 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.