How to Bleed and Replace Brake Fluid on a 2021 Can-Am Outlander 850 XT-P
Shop parts for a 2021 Can-Am Outlander 850 XT-P ATV.
This MotoSport-exclusive guide walks you through safe, repeatable steps to change the brake fluid and properly bleed the hydraulic system on a 2021 Can-Am Outlander 850 XT-P. Follow every step carefully, use the right fluid, and respect safety precautions to keep the brake system reliable on- and off-road.
Notes unique to the 2021 Can-Am Outlander 850 XT-P
- The Outlander 850 XT-P uses separate front and rear master cylinders: the front master is on the right handlebar; the rear master is actuated by the foot brake pedal with the reservoir located near the frame on the right side. Verify reservoir locations before beginning.
- OEM systems call for DOT 4 brake fluid. Use fresh, unopened DOT 4; never mix DOT 5 (silicone) with DOT 4. If you prefer a high-performance DOT 4 with enhanced boiling point, ensure compatibility with seals.
- Hydraulic fittings on this model use banjo bolts with crush washers on caliper lines. Inspect and replace crush washers if they show damage or leaks after reassembly.
- ABS or combined-brake systems: some Outlander models have combined braking features. If your unit has any ABS or electronic brake components, consult your service manual for any model-specific bleeding procedures and avoid depressing pedals while systems are powered unless instructed otherwise.
Tools & materials
- Fresh DOT 4 brake fluid
- Clear plastic tubing that fits brake bleeder nipples snugly
- Catch bottle for old fluid
- Wrench set (common sizes 8mm-12mm for bleeder/banjo bolts)
- Brake-bleeder kit (vacuum or pressure) or helper for manual pump-bleeding
- Clean rags, gloves, safety glasses
- Torque wrench (for banjo bolts and reservoir cap fasteners if required)
- Brake-clean spray for caliper/pad area cleanup
Preparation and safety
- Work on a level surface with the engine off and key removed. Block the machine from rolling and chock wheels.
- Protect painted surfaces from brake fluid; it will damage plastic and paint. Keep rags handy to catch drips.
- Wear eye protection and gloves. Brake fluid is corrosive to skin and finishes.
- Open the reservoir caps slowly to relieve any pressure. Clean around caps before opening to prevent contamination.
Step-by-step bleed and fluid replacement
- Drain remaining fluid from reservoirs: use a syringe or turkey baster to remove old fluid from both front and rear reservoirs. Do not reuse drained fluid.
- Top reservoirs with a small amount of fresh DOT 4 to keep master-cylinder internals wet while you work. Keep reservoirs capped loosely when not actively bleeding to limit contamination and moisture pickup.
- Decide bleed order: use the farthest caliper from each master cylinder first and progress to the nearest. If unsure, bleed the rear circuit first, then the front circuit, or follow the master-to-farthest sequence: for handlebar master bleed the farthest front caliper first, then the nearer one; for foot master bleed the farthest rear caliper first.
- Attach clear tubing to the bleeder nipple on the caliper and route into a catch bottle partially filled with a small amount of fresh fluid to avoid sucking air back in.
- If using a pressure bleeder, pressurize the reservoir per tool instructions to about 15-20 psi. If using vacuum or helper method, have the helper operate the brake lever/pedal firmly and release slowly as you open and close the bleeder.
- Open the bleeder nipple about 1/4 turn. For pressure/vacuum bleeding, allow fluid to flow until clear, bubble-free fluid appears. For manual bleeding, have helper pump to about firm pressure and hold; open nipple to let fluid/air escape, then close nipple before helper releases lever/pedal. Repeat until no air bubbles appear and fluid is clear.
- Top up the reservoir frequently to prevent the master cylinder from drawing air. Never let the reservoirs run dry during the process.
- Work both calipers in the circuit until consistent firm lever/pedal feel is achieved and no air exits during bleeding. Repeat the whole circuit if any sponginess remains.
- When finished, tighten bleeder screws to spec hand-tight plus a small fraction as appropriate (consult service manual if available), wipe clean, and reinstall any displaced components. Replace banjo bolt crush washers if removed and torque banjo bolts to manufacturer spec if disturbed.
- Fill reservoirs to the correct level, reinstall caps and secure. Dispose of old brake fluid responsibly; do not pour it down drains or on the ground.
Post-bleed checks
- Operate brakes at low speed in a safe area to confirm firm, predictable braking.
- Inspect all fittings, hoses, calipers and reservoirs for leaks after a short test ride.
- If lever or pedal still feels soft, repeat bleeding sequence; trapped air is the usual cause.
- Record service date and fluid type in your maintenance log; brake fluid absorbs moisture over time so replace every 1-2 years depending on riding conditions.
Common issues & troubleshooting
- Persistent spongy lever: check for hidden air in ABS modulator or a faulty master cylinder. If bleeding fails to remove softness, inspect master cylinder seals and replace if necessary.
- Leaking banjo or bleeder: replace crush washers and torque bolts correctly. Replace corroded lines or fittings.
- Contaminated fluid after flooding: if fluid is dark or contains debris, perform a full reservoir flush and consider caliper removal and internal inspection.
Final advice from MotoSport
Use fresh DOT 4, keep systems clean, and never let the reservoirs run dry while bleeding. If you encounter ABS-specific behavior, excessive corrosion, or repeated air ingress, consult a qualified technician. Properly bled brakes are critical to safety — do not rush the procedure.
Related Shopping Categories
Shop Brake Fluid for a 2021 Can-Am Outlander 850 XT-P ATV.
Shop Brake Bleeders for a 2021 Can-Am Outlander 850 XT-P ATV.
Shop Brake Pads for a 2021 Can-Am Outlander 850 XT-P ATV.
Shop Brake Lines for a 2021 Can-Am Outlander 850 XT-P ATV.
Shop Brake Tools for a 2021 Can-Am Outlander 850 XT-P 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.