The brake pad on a motorcycle is a small, cheap part, but its function is vital. When the pad runs out, braking force first decreases, then the metal backing of the pad starts to rub on the disc; at that point both the stopping distance gets longer and the expensive brake disc is damaged. The good news: checking the pads is a few minutes' job and on most motorcycles can be done without even tools. In this guide we explain when pads should be changed, how to check them and which pad type suits you.
How do you check the pads?
- Look inside the caliper: hold a torch behind or in front of the brake caliper and look at the two pads resting against the disc. Some calipers have an inspection window on top.
- Find the wear groove: on the friction surface of most pads there is a groove running through the middle. If this groove has disappeared or become very shallow, the pad is at its replacement limit.
- Estimate the thickness: if there is no groove, look at the thickness of the friction material remaining above the metal backing. Many manufacturers recommend replacement when the material falls to about 1.5–2 mm; the exact limit is in the manual.
- Compare the two pads: the inner and outer pads can wear differently. Go by the thinner one.
- Front and rear: check both brakes. The front brake generally wears faster because it provides most of the braking force; but for riders who use the rear brake heavily, the rear pad runs out quickly too.
Carry out the check once a month, before a long trip and at every periodic service. You can use the maintenance log to keep track of servicing.
Signs that the pads have run out
- Metallic squeal or growl: the friction material may have run out and the metal backing be rubbing on the disc. Check immediately.
- Reduced braking force: if you have to apply more force to the lever for the same stopping distance.
- The brake lever or pedal travels further: as the pads thin, the caliper pistons extend and the level in the hydraulic reservoir drops. If the lever feel has become spongy, there may also be air in the hydraulics or aged brake fluid.
- Deep lines on the disc: lines you can feel with a finger on the disc surface are caused by metal-on-metal rubbing from the pad or by sand and stone particles caught between them.
- Vibration: if you feel vibration in the lever or handlebar when braking, the disc may be warped or unevenly worn.
How long do pads last?
There is no single km figure; riding style, the motorcycle's weight, city versus mountain-road use, pad type and road conditions determine lifespan. In stop-start city traffic, in two-up and loaded use, and on mountain roads with frequent descents, pads wear much faster. In mainly motorway use they last a long time. So regular visual checks are more reliable than counting km.
Pad types
| Type | Characteristics | Suitable use |
|---|---|---|
| Organic | Soft, quiet, gentle on the disc; performance can drop when hot, wears faster | Light motorcycles, scooters, city use |
| Semi-metallic or carbon-ceramic | Between organic and sintered; under different names from some manufacturers | Daily use and mixed roads |
| Sintered (metal) | Resistant to high heat, consistent in the wet, long-lasting; can wear the disc more | Mid- and large-capacity motorcycles, long distance, sporty use |
Important: some brake discs are not compatible with sintered pads; especially older ones and on some small motorcycles. Check compatibility in the manual or with the disc manufacturer. On a motorcycle that originally had sintered pads, switching to organic pads changes the brake feel.
Check the brake disc too
When changing pads, always look at the condition of the disc:
- Minimum thickness: "MIN TH" and a millimetre value are generally written on the disc. If the disc has worn below this value, it must be replaced. A micrometer is used for measuring.
- Edge step: if a clear step has formed on the outer edge of the disc, the disc has thinned.
- Warping: if there is vibration, the service centre measures the disc's runout.
- Cracks: on drilled discs, if there are cracks around the holes the disc must be replaced immediately.
If you fit new pads to a disc with deep scoring, the pad wears quickly and does not make full contact.
Brake fluid
Brake fluid absorbs moisture over time and its boiling point drops. In heavy braking, especially on long mountain descents, moist fluid can form vapour bubbles and cause the brake lever to go to waste. As a general rule brake fluid is changed every 2 years; the type to use (DOT 4 on most motorcycles) is written on the reservoir cap and in the manual. If the fluid in the reservoir window has turned dark, it may be time to change it.
After changing the pads
- Seat the pistons: after the change, before moving the motorcycle, press the brake lever and pedal several times; the brake may not bite on the first press.
- Bedding in: for the new pad to seat fully on the disc, avoid hard braking for the first 100–200 km; heat up and cool down the pads with progressive braking from moderate speed. Follow the bedding-in method recommended by the pad manufacturer.
- Fluid level: because the pistons are pushed back, the level in the reservoir rises; check it so that it does not overflow.
If you will change the pads yourself, the correct torque values and retaining pins are critical. If you are not sure, leave it to a service centre; among do-it-yourself jobs, the brake is a system that allows no mistakes.
Price ranges
According to our site's gear data, motorcycle brake pad prices in Turkey are roughly 275 – 642 ₺ at the economy level, 766 – 1,990 ₺ at the mid level and 2,458 – 3,546 ₺ at the top level. Recommendations are on the brake pad page. For the annual budget including labour and other maintenance items, see the cost calculation.
Will you change the pads yourself?
Changing pads can be done with basic tools on many motorcycles, but the brake system allows no mistakes. If you will do it yourself, first learn the torque values and the removal sequence in the manual. Before removing the caliper, clean around the disc and wheel; clean the dust inside the caliper with brake cleaner, and do not breathe in the pad dust with compressed air. When pushing the pistons back, watch that the reservoir cap does not overflow, and use a suitable tool so as not to damage the pistons. When fitting the new pads, put the retaining pins and springs in completely; do not get oil or grease on the pad surface.
When you are done, pump the brake lever several times to seat the pistons against the pads, and check that the brake bites fully before riding the motorcycle. Make the first ride at low speed in a place with no traffic. If you are unsure about any of these steps, leave the job to a service centre; a brake job done incorrectly can harm not only the motorcycle but you.
Conclusion
Check the pads by eye once a month: replace them if the wear groove has disappeared or the material has dropped to around 1.5–2 mm. Squealing, a lengthening stopping distance and a lever that travels deep are early warnings. At the change, check the disc and fluid too, and bed in the new pads over the first kilometres. For correct braking technique, take a look at the braking technique guide.
Frequently asked questions
At how many km do motorcycle pads need changing?
There is no fixed km; riding style, motorcycle weight and road type determine it. Make the decision by looking at the wear groove and the remaining material thickness rather than km.
What happens when the pads run out?
Braking force decreases, then the metal backing of the pad starts to rub on the disc. This lengthens the stopping distance and quickly damages the disc; replacing a disc is far more expensive than pads.
Should I buy sintered or organic pads?
Go by your motorcycle's original pad type and the disc's compatibility. Organic pads are common for light city use, and sintered pads for long distance and large motorcycles.
Should front and rear pads be changed together?
Not mandatory; they can be changed separately according to wear. However, the pads on both sides of the same brake, for example the pads of the two calipers on a twin-disc front brake, should be changed together.