Replacing the brake pads on a 2009 Honda TRX450R is an essential maintenance task that ensures optimal braking performance and safety. This comprehensive guide will walk you through the process of replacing both front and rear brake pads on your ATV, providing detailed instructions and helpful tips along the way.
Tools and Materials Needed
To replace the brake pads on your Honda TRX450R, you’ll need the following tools and materials:
- New brake pads (front and rear sets)
- Socket wrench set
- Allen wrench set
- Flathead screwdriver
- Pliers
- Brake cleaner
- Clean rags
- Brake grease or anti-seize lubricant
- Torque wrench
- Jack and jack stands (optional)
Having these tools and materials ready before you start will make the brake pad replacement process smoother and more efficient.
Safety Precautions
Before beginning the brake pad replacement, it’s crucial to take proper safety precautions:
- Park your TRX450R on a level surface and engage the parking brake.
- Allow the ATV to cool down completely if you’ve been riding recently.
- Wear safety glasses and gloves to protect yourself from debris and brake dust.
- If using a jack, ensure it’s properly positioned and the ATV is securely supported on jack stands.
Taking these safety measures will help prevent accidents and injuries during the brake pad replacement process.
Inspecting Brake Pad Wear
Inspecting your TRX450R’s brake pads for wear is an important step before replacement. Here’s how to check brake pad wear:
- Locate the brake calipers on both front wheels and the rear axle.
- Look for the brake pads through the openings in the caliper.
- Check the thickness of the brake pad material. If it’s less than 1/8 inch (3mm) thick, it’s time for replacement.
- Inspect the brake rotors for scoring, warping, or other damage.
Regular brake pad inspections can help you identify wear before it becomes a safety issue and allows you to plan for timely replacements.
Removing the Wheels (Optional)
While it’s possible to replace the brake pads without removing the wheels, taking them off can provide better access and visibility. Here’s how to remove the wheels:
- Loosen the wheel nuts slightly before lifting the ATV.
- Use a jack to lift the ATV and support it securely with jack stands.
- Remove the wheel nuts completely and take off the wheels.
Remember to consult your TRX450R’s owner’s manual for specific instructions on proper jacking points and procedures.
Front Brake Pad Replacement
Replacing the front brake pads on your Honda TRX450R involves several steps:
- Locate the front brake calipers on each side of the front wheels.
- Remove the caliper mounting bolts using a socket wrench.
- Carefully slide the caliper off the rotor, being careful not to damage the brake line.
- Remove the old brake pads from the caliper.
- Clean the caliper and piston with brake cleaner and a clean rag.
- Use a flathead screwdriver or brake piston tool to gently push the piston back into the caliper.
- Install the new brake pads, making sure they are seated correctly in the caliper.
- Slide the caliper back over the rotor and reinstall the mounting bolts.
- Tighten the bolts to the manufacturer’s specified torque.
Repeat this process for both front brake calipers to ensure even braking performance.
Rear Brake Pad Replacement
The rear brake pad replacement process is similar to the front, with a few differences:
- Locate the rear brake caliper near the rear axle.
- Remove the caliper mounting bolts and slide the caliper off the rotor.
- Take out the old brake pads from the caliper.
- Clean the caliper and piston thoroughly.
- Push the piston back into the caliper using a suitable tool.
- Install the new rear brake pads, ensuring proper fitment.
- Slide the caliper back onto the rotor and reinstall the mounting bolts.
- Tighten the bolts to the specified torque.
Pay attention to any differences in the rear brake pad design compared to the front pads, as they may have slightly different shapes or wear indicators.
Bedding in New Brake Pads
After installing new brake pads, it’s important to bed them in properly:
- Find a safe, open area to ride your TRX450R.
- Accelerate to about 30 mph and apply the brakes firmly to slow down to 5 mph.
- Repeat this process 8-10 times, allowing the brakes to cool between applications.
- Avoid coming to a complete stop during this process to prevent uneven pad material transfer.
Proper bedding helps transfer an even layer of pad material to the rotors, improving brake performance and reducing noise.
Checking Brake Fluid Level
After replacing the brake pads, it’s crucial to check and top up the brake fluid if necessary:
- Locate the brake fluid reservoir on the handlebars for the front brakes and near the rear brake pedal for the rear brakes.
- Clean the area around the reservoir cap to prevent contamination.
- Remove the cap and check the fluid level.
- If low, add DOT 4 brake fluid as specified in your TRX450R’s manual.
- Replace the cap securely.
Maintaining proper brake fluid levels ensures optimal hydraulic pressure in the brake system.
Testing the Brakes
Before riding your TRX450R, test the brakes to ensure proper function:
- Start the ATV and let it idle.
- Slowly roll forward and apply the brakes gently.
- Gradually increase brake pressure to test stopping power.
- Check for any unusual noises, vibrations, or pulling to one side.
- Test both the hand lever (front brakes) and foot pedal (rear brakes) separately.
If you notice any issues during testing, recheck your work or consult a professional mechanic.
Maintenance Tips for Longevity
To extend the life of your new brake pads and maintain optimal braking performance:
- Regularly clean your TRX450R, paying special attention to the brake components.
- Inspect brake pads for wear every 20-30 hours of riding or before long trips.
- Keep brake fluid at the proper level and change it according to the manufacturer’s recommendations.
- Avoid riding through deep water or mud, which can contaminate the brakes.
- Address any brake-related issues promptly to prevent more serious problems.
Following these maintenance tips will help ensure your TRX450R’s brakes remain in top condition for longer periods.
Troubleshooting Common Issues
Even with proper installation, you may encounter some common brake-related issues:
- Squealing or squeaking brakes: This may indicate contamination or improper bedding. Clean the rotors and re-bed the pads.
- Spongy brake feel: This could be due to air in the brake lines. Bleed the brakes according to the manual’s instructions.
- Uneven braking: Check for sticking pistons or unevenly worn pads. Clean and lubricate caliper slides if necessary.
- Brake drag: Ensure the pistons are fully retracted and the pads are not binding in the caliper.
- Reduced stopping power: Verify that you’ve installed the correct brake pads and that they’re properly seated in the caliper.
If these troubleshooting steps don’t resolve the issue, consult a professional mechanic for further diagnosis.
When to Seek Professional Help
While brake pad replacement is a task many ATV owners can handle, there are situations where professional help is advisable:
- If you’re unsure about any step in the process
- When specialized tools are required that you don’t have access to
- If you notice significant wear or damage to the rotors or other brake components
- When bleeding the brake system is necessary
- If you experience persistent brake issues after replacement
A professional mechanic can ensure your TRX450R’s brakes are in perfect working order, providing peace of mind for your riding adventures.
Conclusion
Replacing the brake pads on your 2009 Honda TRX450R is a crucial maintenance task that can be accomplished with the right tools, knowledge, and patience. By following this comprehensive guide, you can ensure your ATV’s braking system remains in top condition, providing reliable stopping power and safety during your off-road excursions. Remember to always prioritize safety, follow the manufacturer’s recommendations, and seek professional help when needed. With proper care and maintenance, your TRX450R will continue to deliver exhilarating rides and dependable performance for years to come.