How to Bleed & Replace Brake Fluid on a 2021 CFMOTO CFORCE 600

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This MotoSport-exclusive service guide walks you through safely replacing brake fluid and bleeding the hydraulic system on a 2021 CFMOTO CFORCE 600. Follow these steps carefully to restore firm brake lever/pedal feel and remove moisture-contaminated fluid. Read all steps before beginning and work in a clean, well-lit area.

What you’ll need

  • DOT 4 brake fluid (fresh, unopened)
  • Clear plastic hose and catch bottle
  • Brake bleeder wrench or 8-10 mm open wrench (verify bleeder size)
  • Turkey baster or syringe for old fluid removal
  • Clean rags, brake cleaner, gloves & eye protection
  • Jack or ramps to access wheels (if needed)
  • Torque wrench (for reassembly checks)
  • Optional: vacuum bleeder or pressure bleeder for one-person bleeding

Safety & prep

  • Brake fluid damages paint — cover painted surfaces and fenders before opening the reservoir.
  • Work on a level surface with the machine secured in park and ignition off.
  • Wear nitrile gloves & eye protection. Dispose of used fluid per local regulations.
  • Confirm whether your CFORCE 600 is a conventional hydraulic system, linked brake system, or has any factory ABS option. If your machine has ABS or linked brakes, consult the model-specific service manual for any special bleeding sequence or ABS pump cycling before proceeding.

Identify components

Locate the master cylinder reservoir (usually mounted near the handlebar for front brake and near the driver floor for rear on linked systems). Identify each caliper and its bleed nipple(s). For linked or combined systems, confirm which lever/pedal actuates which calipers before beginning.

Step-by-step procedure

  1. Clean the reservoir cap area, remove the cap, and gently lift out the diaphragm to expose fluid. Note the current fluid level and color. Use a turkey baster to remove most of the old fluid from the reservoir, leaving a small amount to keep the seal wet.
  2. Refill reservoir with fresh DOT 4 brake fluid to the full mark. Keep the cap loosely installed between steps to limit contamination.
  3. Determine bleed order: always bleed the caliper farthest from the master cylinder first, then proceed to the next farthest, finishing with the nearest caliper. If you are unsure which caliper is farthest, use this common sequence as a baseline: rear calipers first, then front calipers. For linked systems, follow the linked brake sequence found in your owner manual or use the farthest-from-master rule for each circuit.
  4. Attach a clear hose to the bleeder nipple and place the other end in a catch bottle partially filled with clean fluid to prevent air reentry. Slightly loosen the bleeder screw.
  5. Bleeding methods:
    • Two-person pump method: One person slowly depresses the brake lever/pedal while the other opens the bleeder about 1/4 turn. Close the bleeder before the lever/pedal is released. Repeat until fluid runs clear with no air bubbles. Keep the master reservoir topped up to avoid drawing air into the system.
    • One-person vacuum or pressure bleeder: Follow the tool manufacturer’s instructions. Maintain fresh fluid in the reservoir throughout the process.
  6. Work through each caliper in the chosen sequence until clear, bubble-free fluid flows from each bleeder and the lever/pedal feel is firm. Frequently check and refill the master reservoir.
  7. When finished, tighten bleeder screws to a snug specification (do not over-torque; consult your service manual for exact torque values if available). Wipe all fittings and remove the hose.
  8. Top the reservoir to the proper level, reinstall the diaphragm and cap securely. Clean any spilled fluid from components and painted surfaces immediately.
  9. Pump the brake a few times with the ignition on (if brake light switch requires activation) to confirm firm feel. Inspect for leaks around calipers, lines, banjo fittings and bleeder screws.
  10. Test ride slowly in a safe area to verify braking performance before returning to regular use.

Notes specific to the 2021 CFMOTO CFORCE 600 owner

  • CFORCE 600 models may be configured with single-circuit or linked braking layouts depending on trim and regional specification. Confirm your machine’s configuration before changing fluid or bleeding. If your machine has linked brakes, bleeding each circuit separately and in the correct order is critical for balanced operation.
  • The brake reservoir caps and diaphragms on CFORCE units are plastic & rubber; avoid overtightening caps and ensure the diaphragm is seated correctly to prevent leaks and contamination.
  • OEM calipers and banjo fittings are susceptible to corrosion if old fluid is left in the system — full fluid replacement is recommended every 1-2 years or sooner if the fluid color is dark. Replace copper crush washers on banjo bolts if they are disturbed or if a leak is present.
  • After service, visually inspect brake hose routing and mounting brackets unique to the CFORCE 600 for chafing or damage that could have been masked by old fluid. Replace hoses that show soft spots, bulges, or external damage.
  • If you notice an inconsistent pedal or lever feel after bleeding, or if large amounts of air are present repeatedly, suspect a leaking seal, a compromised master cylinder, or internal ABS pump issue — have the system inspected by a qualified technician.

Maintenance tips

  • Replace brake fluid every 12-24 months depending on use and exposure to moisture.
  • Store spare DOT 4 fluid sealed and away from moisture; once opened, use within a short period to avoid moisture uptake.
  • Keep a small bottle of fresh DOT 4 in your maintenance kit for topping during future bleed jobs, but do not dilute older fluid with new fluid as a substitute for a full flush.

Completing a proper bleed and fluid change restores braking performance and extends the life of brake components on your CFORCE 600. If any doubt remains about system configuration or ABS/linked functions, consult your MotoSport technician for model-specific support.

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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.