How to Change Brake Pads on a 2006 KTM 250EXC-RFS

Shop parts for a 2006 KTM 250EXC-RFS Dirt Bike.

Brake system overview for the KTM 250EXC-RFS

The KTM 250EXC-RFS, like most modern dirt bikes, uses hydraulic disc brakes: a lever or pedal actuates a master cylinder which pressurizes brake fluid through a hydraulic line to a caliper. The caliper squeezes brake pads against a steel rotor to slow the wheel. Key components you'll interact with are the brake lever or pedal, master cylinder, hydraulic line, brake caliper, brake pads, rotor, and the pad retaining hardware (pins or clips).

When to replace pads & why it matters

  • Reduced braking power or longer stopping distances.
  • Squealing, grinding, or metallic noises when braking.
  • Excessive lever or pedal travel before braking bite.
  • Visible pad material worn thin – less than 1.5-2 mm of friction material is a common sign.
  • Heat discoloration or scoring on the rotor indicating aggressive wear.

Maintaining strong, predictable brakes on the 250EXC-RFS is crucial for trail control and safety, especially given this bike's enduro/off-road power and light weight.

Tools & supplies

  • Socket set or wrench for axle & caliper bolts
  • Pliers or small punch for cotter pins, retaining clips, or spring clips
  • Flat screwdriver or pry tool
  • Brake cleaner & clean rags
  • New brake pads specific to KTM 250EXC-RFS
  • Small C-clamp or piston tool (or clean block of wood) to compress pistons
  • Torque wrench for axle & caliper fasteners

Quick inspection before you start

  • Confirm which wheel needs pads – front lever for front caliper, rear pedal for rear caliper.
  • Check pad thickness, rotor surface, and look for fluid leaks around the caliper or hose.
  • Note any caliper or axle peculiarities on your 2006 KTM 250EXC-RFS (many EXC models use a two-bolt sliding caliper in front and single or double piston arrangements depending on year).

Step-by-step – changing the pads

  1. Prepare the bike and workspace: park on a flat surface, shift to neutral, and remove the key. Clean mud from around the caliper area with a brush so you don't push dirt into the brake while working.
  2. Support the bike: use a center stand or a sturdy dirt bike stand so the wheel is off the ground and stable. For the front, place the stand under the frame so the wheel spins freely; for the rear, lift the bike from the swingarm.
  3. Remove the wheel if needed: some caliper designs let you change pads without dropping the wheel, but removing the wheel gives easier access. Loosen axle nuts, remove axle, then slide the wheel out following your KTM's wheel alignment steps.
  4. Remove the pad retaining hardware: locate the retaining pin(s) or spring clip on the caliper. Use pliers or a punch to remove cotter pins or pull out the retaining clip. Keep hardware in a clean spot for reuse if it's reusable.
  5. Slide the old pads out: pry the pads free with a flat screwdriver if necessary. Note how the pads and springs sit in the caliper so you install new parts the same way.
  6. Inspect rotor & caliper: clean the rotor surface with brake cleaner and a rag. Look for deep scoring, warping, or heat spots. Check caliper pistons for corrosion and ensure the caliper body is free of debris. If you see fluid leaking, note it for future attention.
  7. Compress the caliper piston(s): with the caliper mounted, press the brake lever/pedal to position pistons slightly outward, then use a C-clamp or piston tool to slowly push the pistons back into the caliper bore until they are flush. Place an old pad or block of wood between the piston and clamp to protect the piston face. This creates room for the new, thicker pads.
  8. Install the new pads: position the pad spring/shim correctly, slide the new pads into the caliper grooves until they seat fully. Make sure any anti-rattle clips or shims are in their original position.
  9. Reinstall retaining hardware: fit the retaining pin or clip, secure any cotter pins, and ensure the pin is fully seated. Replace worn pins or clips rather than reusing damaged hardware.
  10. Reinstall the wheel (if removed): slide the wheel back into the forks or swingarm, align spacers, and torque axle nuts to the specified value. Re-check caliper alignment and that the rotor spins freely without rubbing excessively.
  11. Restore hydraulic pressure: with the bike on the ground or securely supported, pump the brake lever or pedal several times until it firms up and proper bite returns. If the lever feels spongy after pumping, air may be in the line – see a shop if you don't want to bleed brakes at home.
  12. Final checks: verify pad retention is secure, no brake fluid has leaked, and the lever/pedal travel is normal. Spin the wheel and ensure the rotor doesn't rub under light spin.

Helpful inspection tips while you're in there

  • Measure rotor thickness & visually inspect for grooves. Replace rotor if excessively worn or warped.
  • Check for brake fluid at the caliper piston seals – any wetness usually means a seal issue.
  • Make sure sliding pins (if present) move freely after cleaning and lubricate lightly with brake-safe grease where appropriate.
  • Clean the caliper bracket channel and remove any packed mud that could prevent pad seating.
  • Confirm retaining pins and clips are the correct length and fully engaged to prevent pad migration.

Bedding in new pads

Do ten to fifteen moderate stops from 20-30 mph, progressively increasing braking force but avoiding hard emergency stops for the first few runs. This seats the pad material to the rotor surface for consistent bite. Check for unusual noises or vibration after bedding and recheck fasteners.

Closing notes

Changing brake pads on a 2006 KTM 250EXC-RFS is a straightforward maintenance task with basic tools. Regular inspection after muddy rides or long enduro sessions keeps braking performance sharp and predictable. If you encounter persistent leaks, spongy lever feel after pumping, or unusual caliper behavior, consult a technician for further service.

Related Shopping Categories

Shop Brake Pads for a 2006 KTM 250EXC-RFS Dirt Bike.

Shop Brake Rotors for a 2006 KTM 250EXC-RFS Dirt Bike.

Shop Brake Lines for a 2006 KTM 250EXC-RFS Dirt Bike.

Shop Brake Bleeders for a 2006 KTM 250EXC-RFS Dirt Bike.

Shop Brake Tools for a 2006 KTM 250EXC-RFS Dirt Bike.

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.