How to Change Brake Pads on a 2011 Yamaha YZ85
Shop parts for a 2011 Yamaha YZ85 Dirt Bike.Why brake pad maintenance matters on your 2011 Yamaha YZ85
The 2011 Yamaha YZ85 is a lightweight youth motocross machine with a small-displacement engine that still demands predictable stopping power. Most modern dirt bikes including the 2011 YZ85 use hydraulic disc brakes — a lever or pedal actuates a master cylinder that sends fluid through a hydraulic line to a caliper that squeezes brake pads against a steel rotor. Keeping pads in good condition maintains consistent braking performance, helps control the bike on rough or tight tracks, and prevents damage to the rotor.
Quick brake system overview
- Brake lever or pedal – where rider inputs braking force.
- Master cylinder – converts lever force into hydraulic pressure.
- Hydraulic brake line – carries fluid to the caliper.
- Brake caliper – holds pads and pushes them onto the rotor.
- Brake pads – friction material that contacts the rotor.
- Brake rotor – steel disc attached to the wheel that the pads grip.
Hydraulic pressure forces the pads against the rotor to slow the bike. On the YZ85 you'll typically see a single large front disc and a smaller rear disc sized for youth bikes; caliper designs for this era are straightforward and accessible for garage-level work.
Signs your YZ85 needs new brake pads
- Reduced braking power or longer stopping distances.
- Squealing, squeaking, or grinding noises when braking.
- Excessive lever or pedal travel before the brakes engage.
- Visible pad material worn thin – less than a few millimeters of friction material.
- Heat discoloration, scoring, or grooves on the rotor surface.
Inspect pads regularly, especially after muddy rides or consecutive motos where heat buildup and abrasive debris accelerate wear.
Tools & supplies you'll need
- New brake pads sized for 2011 Yamaha YZ85
- Basic hand tools – sockets, wrenches, pliers
- Flatblade screwdriver or small pick
- Shop rags and a parts tray
- Brake cleaner or isopropyl alcohol
- Rubber gloves (optional) and a soft mallet if needed
- Bike stand to keep the wheel off the ground
Step-by-step – change the brake pads
- Prepare the bike and workspace. Park the YZ85 on a stable stand with the wheels off the ground. Clean the area around the caliper to prevent dirt from entering the caliper during the job.
- Decide whether to remove the wheel. On many YZ85 front calipers you can access the pads with the wheel in place; rear calipers sometimes require wheel removal for better access. If removing the wheel, loosen axle hardware and slide the wheel out following common wheel-removal practice.
- Locate and remove the pad retaining hardware. Most YZ85 calipers use a retaining pin or clip. Use pliers or a screwdriver to remove the clip, then slide out the pin. Keep small parts on a tray.
- Slide the old pads out. Use a screwdriver gently if needed to pry them free, taking care not to damage the caliper. Note pad orientation and any shims so you install new pads the same way.
- Inspect rotor and caliper. Wipe the rotor with brake cleaner and a rag. Look for deep grooves, heat spots, or excessive runout. Inspect caliper pistons and boot seals for dirt or leaks.
- Compress the caliper piston(s). With the pads removed, push the piston(s) back into the caliper bore to make room for the thicker new pads. Use a flatblock or a dedicated piston compressor, or carefully use the old pad face and a C-clamp. Compress slowly to avoid fluid spillage up the line; keep a rag under the master cylinder area in case fluid moves backward in the system.
- Fit the new pads. Clean the backing plate and any shims, then slide the new pad set into the caliper in the same orientation as the old pads. Ensure anti-rattle shims or clips are positioned correctly if supplied.
- Reinstall retaining pin/clip. Replace the pin and secure the clip or bolt. Make sure the hardware seats fully and the pads don't have excessive lateral play.
- Reinstall the wheel (if removed) and torque axle hardware to the correct tightness using your usual torque practices for the YZ85.
- Restore hydraulic pressure. Slowly pump the brake lever or pedal several times until you feel firm engagement. This seats the pads against the rotor and removes any free play.
- Final check. Spin the wheel to ensure the rotor isn't rubbing excessively and that the brake releases fully. Tighten any hardware rechecked during the job.
Helpful inspection tips while you're in there
- Check rotor thickness and look for deep scoring; small surface scratches are normal but heavy grooving may require rotor dressing or replacement.
- Look for any fluid seepage around the caliper or banjo bolt – leaks mean service elsewhere in the hydraulic circuit.
- Confirm the caliper slides freely on its mounting pins or guide bolts; clean and lightly lube slide surfaces with appropriate grease if dry.
- Clear mud and debris from the caliper bracket and rotor hat area to prevent contamination of the new pads.
- Make sure retaining pins, clips, and any cotter pins are secure and not bent or worn.
Bedding in new pads
Bedding is simple but important. On a quiet stretch or around your track, perform a series of controlled stops from moderate speed – about 8 to 12 stops where you apply steady braking until just short of a full stop, allowing the pads to heat and deposit an even layer on the rotor. Avoid repeated hard stops from top speed on the first ride. After bedding, the lever or pedal feel should be consistent and braking performance improved.
Notes on YZ85 braking setups
The YZ85 is a youth motocross bike with smaller rotors and calipers compared to full-size dirt bikes, so pad wear can be quicker under heavy riding like consecutive motos. Most YZ85s of this era use a single-piston or small multi-piston caliper depending on front or rear application; no major design changes for the 2011 model are widely noted, but always check pad fitment for your exact model year to ensure correct shape and retaining hardware.
Regular pad inspections and simple garage-level replacement keep your 2011 Yamaha YZ85 stopping predictably so you can focus on lap times and smooth landings.
Related Shopping Categories
Shop Brake Pads for a 2011 Yamaha YZ85 Dirt Bike.
Shop Brake Rotors for a 2011 Yamaha YZ85 Dirt Bike.
Shop Brake Lines for a 2011 Yamaha YZ85 Dirt Bike.
Shop Brake Bleeders for a 2011 Yamaha YZ85 Dirt Bike.
Shop Brake Tools for a 2011 Yamaha YZ85 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.
