How to Change Brake Pads on a 1998 Yamaha PW50
Shop parts for a 1998 Yamaha PW50 Dirt Bike.Quick brake system overview
On most modern dirt bikes including the Yamaha PW50 you'll find a basic hydraulic disc brake layout: a brake lever or pedal, master cylinder, hydraulic line, brake caliper, brake pads, and a steel rotor. When you pull the lever or press the pedal hydraulic pressure pushes the caliper pistons, squeezing the pads against the rotor to slow the bike. Knowing these parts helps you understand what you'll be inspecting and replacing.
When to replace pads & why it matters
- Reduced braking power during normal riding.
- Squealing, grinding, or metallic scraping sounds when braking.
- Excessive lever or pedal travel before engagement.
- Visible pad material worn thin or backing plate showing.
- Heat discoloration, heavy scoring, or blueing on the rotor surface.
On a small-displacement, youth-oriented machine like the PW50, good brakes are essential for low-speed control and rider confidence. Replace pads promptly to keep stopping predictable and avoid rotor damage.
Tools & prep
- Common hand tools: set of sockets, wrenches, pliers, and a screwdriver.
- Needle-nose pliers or snap-ring pliers for retaining clips.
- A clean rag, brake cleaner, and a flat punch or drift (for retaining pins).
- Small C-clamp or a brake piston tool to compress pistons.
- Bike stand or a solid support to lift the bike so the wheel spins free.
Work in a well-lit, flat area. Keep brake fluid away from painted surfaces and avoid contaminating new pads with oil or grease.
Step-by-step – changing the brake pads on your 1998 Yamaha PW50
- Secure and support the bike. Place the PW50 on a stand so the wheel you're working on is off the ground and the bike is stable.
- Decide if the wheel needs removing. On many youth bikes you can access the caliper without removing the wheel; if caliper clearance is tight, remove the wheel following normal axle and spacer removal procedures.
- Locate and remove the pad retaining pin or clip. Most PW50 calipers have a pin or circlip through the pad ears. Use pliers or a punch to remove the retaining clip and slide the pin out.
- Slide the old pads out. Pull the pads free of the caliper. Note pad orientation and any shims or anti-rattle pieces so you can reinstall correctly.
- Inspect caliper and rotor. Check the rotor for scoring or warping and the caliper bore for debris. Wipe away mud or grit and use brake cleaner sparingly to remove contaminants.
- Compress the piston(s). With the caliper open, press the lever to expel loose fluid back to the reservoir, then use a C-clamp or piston tool to slowly push the piston(s) back into the bore until there's room for the new pads. Keep the reservoir cap loosely fitted to avoid spills but prevent air entry.
- Install the new pads. Position any shims or clips, slide the pads into the caliper in the same orientation as the old set, and ensure the friction material faces the rotor. Reinstall the retaining pin and secure the clip or fastener.
- Reinstall the wheel if removed. Refit axle and spacers, torque axle and pinch bolts to factory or typical tightness for a small bike, and ensure the wheel spins freely without rubbing.
- Restore hydraulic pressure. Slowly pump the brake lever or press the pedal until firm resistance returns and the pads contact the rotor. Check the fluid level and top off if required to the correct mark.
- Final checks. Make sure the retaining pin and clips are secure, caliper moves freely on its guide pins, and there are no leaks. Spin the wheel and apply the brake a few times to confirm engagement.
Helpful inspection tips while you're in there
- Check rotor thickness & surface condition – deep grooves or heavy scoring suggest rotor attention is needed.
- Look for any brake fluid seepage around the caliper seals or lines.
- Confirm the caliper slides freely on its mounts; sticky movement causes uneven pad wear.
- Remove packed mud or pebbles from the caliper bracket or pad slot that can prevent full pad seating.
- Verify retaining pin and clip fit tightly & are not bent or worn.
Bedding in new pads
After installation, bed the pads to the rotor by performing a series of controlled stops from low to moderate speeds. Accelerate to a modest speed, apply progressive braking to near-stopping without locking the wheel, repeat 8–12 times, then allow components to cool. This mates the pad surface to the rotor and restores consistent bite and feel.
Notes on model specifics & braking setups
The Yamaha PW50 is a youth trail/motocrosser where light, predictable braking is the priority. While many modern dirt bikes use larger rotors and multi-piston calipers for aggressive enduro and motocross demands, the PW50's compact hydraulic disc setup is straightforward. If you own adjacent model years, note that rotor sizes or pin clips may vary slightly; always confirm hardware orientation during removal so reinstall is identical.
Wrap-up
Changing the brake pads on a 1998 Yamaha PW50 is a manageable garage task with basic tools: remove the retaining hardware, swap pads, compress pistons, reinstall, and bed the new pads. Regular inspection after muddy rides or long sessions keeps stopping performance consistent and extends the life of rotors and pads, making every ride safer and more controlled.
Related Shopping Categories
Shop Brake Pads for a 1998 Yamaha PW50 Dirt Bike.
Shop Brake Rotors for a 1998 Yamaha PW50 Dirt Bike.
Shop Brake Lines for a 1998 Yamaha PW50 Dirt Bike.
Shop Brake Bleeders for a 1998 Yamaha PW50 Dirt Bike.
Shop Brake Tools for a 1998 Yamaha PW50 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.
