How to Bleed and Replace Brake Fluid on a 2013 Kawasaki Brute Force 650 4X4 (SOLID REAR AXLE)

Shop parts for a 2013 Kawasaki Brute Force 650 4X4 (SOLID REAR AXLE) ATV.

This MotoSport guide covers a full brake fluid change and bleed on the 2013 Kawasaki Brute Force 650 4X4 with the solid rear axle. Procedure is written for a standard DOT 4 hydraulic system that this model uses. Read all steps first and follow safety precautions. If you prefer a shop-quality job but lack tools or confidence, MotoSport parts and tools linked above will help.

Tools & supplies

  • DOT 4 brake fluid (new, unopened)
  • clear vinyl tubing, 3-5 mm ID to fit bleed nipples
  • catch bottle for old fluid
  • wrench set for bleed nipples and banjo bolts (use single-quote-friendly markings)
  • rubber gloves, eye protection
  • clean rags & isopropyl alcohol
  • turkey-baster or syringe (optional) to remove reservoir fluid
  • bleeder kit: vacuum pump or one-person pressure bleeder or helper for two-person pump
  • jack and stands or ramp to raise wheels slightly for access

Model-specific notes for the 2013 Brute Force 650

  • The Brute Force 650 uses a front dual-disc setup and a single rear disc with a solid rear axle configuration. Rear brake plumbing can be routed across the axle so inspect for chafing before work.
  • Reservoir is mounted near the handlebars; keep it capped to limit contamination and moisture pickup. The reservoir is small – plan to top off frequently and work systematically to avoid running dry.
  • No factory ABS to complicate bleeding procedure, but some models have an integrated proportioning valve; do not force seized bleed nipples — apply penetrating oil and back off carefully.
  • Inspect brake hoses for cracking or swelling while replacing fluid; replace any hose showing wear or bulging before bleeding.

Safety prep

  • Work on a level surface with the engine off and key removed.
  • Wear gloves and eye protection. DOT fluid damages paint & plastics — wipe spills immediately.
  • Keep the reservoir cap and diaphragm clean — dirt in the system will reduce braking performance.

Step-by-step fluid replacement & bleed

  1. Clean reservoir cap area. Remove the cap and diaphragm carefully to avoid debris falling in. Use a turkey-baster/syringe to extract as much old fluid from the reservoir as possible.
  2. Refill reservoir with fresh DOT 4 fluid to the MAX level. Do not overfill; keep a spare bottle sealed to top up as needed.
  3. Locate bleed nipples: front calipers (left & right) and rear caliper. Loosen the bleed nipple caps and fit clear tubing to each nipple with the other end into a catch bottle partially filled with fresh fluid to prevent air re-entry.
  4. Recommended sequence for Brute Force 650 (most effective): farthest from master cylinder first — rear caliper, then right front, then left front. If your reservoir is located on the right handlebar, follow this order; if unsure, follow the general rule: far to near.
  5. Bleeding method options:
    • Two-person pump method: One person slowly pumps the brake lever/pedal and holds pressure. While the lever is held, second person opens the bleed nipple about 1/4 turn to let fluid/air escape, then closes nipple before lever release. Repeat until clear, bubble-free fluid exits and lever feel is firm.
    • Vacuum or pressure bleeder: Attach vacuum hose to the nipple or pressure kit to the reservoir and pump until clear fluid exits. Follow kit manufacturer instructions. Keep reservoir level topped up while bleeding to avoid introducing air.
  6. Procedure details:
    • Open the bleed nipple just enough to allow flow; avoid leaving it open under pressure. Tighten to hand plus a quarter turn after each cycle.
    • Maintain reservoir level between MIN and MAX at all times. Never let it go dry.
    • When the fluid runs clear and no bubbles appear, close the nipple securely. Wipe any spilled fluid immediately.
  7. Move to the next caliper and repeat until all calipers are done in the chosen order.
  8. Final checks:
    • Top off reservoir to MAX, re-fit diaphragm and cap cleanly.
    • Pump brake lever/pedal to confirm firm, consistent pressure and no sinking.
    • Inspect all fittings, banjo bolts and nipples for leaks. Torque banjo bolts to snug — factory torque not specified here, so use a calibrated torque wrench or tighten to manufacturer-recommended spec if available. Do not overtighten copper crush washers; replace washers if disturbed.
    • Test drive slowly in a safe area to verify braking performance before riding normally.

Tips, common issues & troubleshooting

  • If brake lever remains spongy after bleeding, repeat the sequence; trapped air is usually the cause.
  • Stubborn bubbles may be in the master cylinder. With clean fluid in the reservoir, slowly crack the master cylinder output line or follow a manufacturer-specific master-cylinder bleed step if available, keeping reservoir topped up.
  • If caliper pistons are sticky, they may need a rebuild rather than just fluid change. Inspect pads and rotor condition while bleeding.
  • Use fresh DOT 4 only; never mix DOT types (DOT 5 silicone is incompatible with DOT 3/4 systems).
  • Dispose of old brake fluid per local hazardous-waste rules; do not pour down drains.

Maintenance interval & final notes

  • MotoSport recommends replacing brake fluid every 1-2 years or sooner if the fluid darkens, whichever comes first. Riding in wet or high-humidity environments accelerates moisture absorption.
  • Inspect the solid rear axle mounting, brake line routing and clip condition whenever you service brakes; axle movement can create chafe points leading to sudden line failure.
  • Keep a small spare bottle of DOT 4 and basic bleed kit in your garage for spot-topups after heavy riding seasons.

Follow these steps carefully and keep all work areas clean. If you run into seized fittings, badly corroded lines, or uncertain master-cylinder behavior, contact a qualified mechanic or bring your parts to MotoSport for replacements and technical advice.

Related Shopping Categories

Shop Brake Fluid for a 2013 Kawasaki Brute Force 650 4X4 (SOLID REAR AXLE) ATV.

Shop Brake Bleeders for a 2013 Kawasaki Brute Force 650 4X4 (SOLID REAR AXLE) ATV.

Shop Brake Pads for a 2013 Kawasaki Brute Force 650 4X4 (SOLID REAR AXLE) ATV.

Shop Brake Lines for a 2013 Kawasaki Brute Force 650 4X4 (SOLID REAR AXLE) ATV.

Shop Brake Tools for a 2013 Kawasaki Brute Force 650 4X4 (SOLID REAR AXLE) 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.