How to Change Brake Pads on a 2004 KTM 250EXC-RFS

Shop parts for a 2004 KTM 250EXC-RFS Dirt Bike.

Brake system overview for the 2004 KTM 250EXC-RFS

The 2004 KTM 250EXC-RFS uses a modern dirt-bike hydraulic disc brake setup common to enduro and trail machines: a lever or pedal actuates a master cylinder, hydraulic brake line transfers pressure to the caliper, and the caliper squeezes brake pads against a steel rotor. Brake pads press on the rotor to convert kinetic energy into heat and slow the bike. Knowing these parts helps when you change pads at the garage level.

When to replace brake pads – common symptoms

  • Reduced braking power or longer stopping distances.
  • Squealing, squeaking, or grinding noises when applying the brake.
  • Excessive brake lever or pedal travel before engagement.
  • Visible pad material worn thin; backing plate showing through.
  • Heat discoloration or heavy scoring on the rotor surface.

Inspect pads regularly, especially after muddy rides, long enduro stages, or hard motocross sessions; water and grit accelerate wear.

Tools & supplies you'll need

  • Socket set and wrenches (common sizes for axle & caliper bolts)
  • Needle-nose pliers and flat screwdriver
  • New brake pads designed for 2004 KTM 250EXC-RFS
  • Clean shop rags and isopropyl alcohol or brake cleaner
  • A small C-clamp or piston press tool
  • Torque wrench (recommended for axle and caliper bolts)
  • Bike stand so the wheel is off the ground

Step-by-step – change the pads

  1. Prepare the bike & workspace. Park on a level surface, choke off the bike (if applicable), and use a stable stand to lift the rear or front so the wheel can rotate freely or be removed. Keep rags handy to catch any dirt.
  2. Decide whether to remove the wheel. Many riders swap pads with the wheel on, but removing the wheel can give better access on the KTM 250EXC-RFS caliper. If you remove the wheel, loosen axle hardware, push axle out, and slide the wheel free while supporting brake components.
  3. Locate and remove the pad retaining hardware. The caliper will use a retaining pin, clip, or bolt to hold pads. Use pliers or the appropriate socket/hex key to remove the pin or clip. Save small parts for reinstallation.
  4. Slide old pads out. Pull the pads straight out of the caliper bracket. If they stick, gently pry with a screwdriver. Note pad orientation so the new ones go in the same way.
  5. Inspect rotor & caliper. Look for heavy scoring, heat spots, or uneven wear on the rotor. Check caliper pistons for corrosion and ensure dust seals are intact. Clean dirt and old brake dust with a rag and brake cleaner.
  6. Compress the caliper piston(s). Before fitting new, thicker pads you must push pistons back into the caliper. Use a clean rag over the piston and a C-clamp to press evenly until the piston is flush. For dual-piston calipers, press both at the same time or alternate evenly to avoid binding.
  7. Fit the new pads. Slide the new pads into the caliper in the same orientation as the old ones. Make sure any anti-rattle springs or shims are positioned correctly and that the friction material faces the rotor.
  8. Reinstall retaining pin & hardware. Replace pin, clip, or bolt and secure to the same torque or tightness as removed. Ensure the retaining components can't rotate or work loose; replace any bent pins or missing clips.
  9. Reinstall the wheel (if removed). Slide the wheel back in, align the rotor between the pads, reinstall the axle, and torque axle nuts to spec where possible. Spin the wheel to confirm it rotates freely without rubbing.
  10. Restore hydraulic pressure. Pump the brake lever or pedal several times until a firm feel returns and the pads clamp the rotor. Check fluid level in the master cylinder and top off if needed.
  11. Final checks. Verify there are no leaks around the caliper or brake line, that the caliper slides smoothly on its guide pins, and that the retaining pin and clip are secure.

Helpful inspection tips while you're in there

  • Measure rotor thickness if you suspect wear; replace if below the commonly accepted minimum for the rotor (many rotors thin with heavy use).
  • Look for uneven pad wear – this can indicate a sticking caliper slide or seized piston.
  • Check for brake fluid leaks at the caliper hose fitting or around the piston seal.
  • Clean mud and grit from the caliper bracket and under shims so pads move freely.
  • Confirm the retaining pin and spring clip are centered and cannot back out during aggressive riding.

Bedding in new pads

New pads must mate to the rotor surface. Start with a series of progressive stops: accelerate to a moderate speed on a safe stretch, make 6–10 controlled stops from that speed to a slower speed without coming to a full lockup. Allow the brakes to cool briefly between sets. This transfers a thin, even layer of pad material to the rotor and restores predictable braking behavior.

Notes about the 2004 KTM 250EXC-RFS braking setup

Most modern dirt bikes including the 2004 KTM 250EXC-RFS use hydraulic disc brakes. Across the EXC line you may see minor generational changes to rotor size or caliper design on later models, but the pad-replacement basics remain the same. The 250cc displacement and enduro-oriented chassis mean you'll often ride in variable conditions where confident braking is crucial for trail clearance, cornering, and control.

Aftercare

  • Re-check lever feel and wheel alignment after the first short ride.
  • Listen for noises and re-torque axle & caliper hardware after initial use.
  • Inspect pads again after a muddy ride; grit can accelerate wear rapidly.

Related Shopping Categories

Shop Brake Pads for a 2004 KTM 250EXC-RFS Dirt Bike.

Shop Brake Rotors for a 2004 KTM 250EXC-RFS Dirt Bike.

Shop Brake Lines for a 2004 KTM 250EXC-RFS Dirt Bike.

Shop Brake Bleeders for a 2004 KTM 250EXC-RFS Dirt Bike.

Shop Brake Tools for a 2004 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.