Brake Rotors
A brake rotor (disc) is a wear item. Replace it when it is below the minimum thickness stamped on the disc, when it has a visible lip at the outer edge, when it is warped and pulses through the lever or pedal, or when it has been bent in a crash. Deep grooves from worn-out pads also mean the disc is done — fitting new pads to a scored rotor wears them out fast.
Front and rear are different parts. Our Front Rotors and Rear Rotors are listed by bike model and year range, so match your machine exactly — a CRF450R front disc and its rear disc share nothing but the brand. ProX discs cover the popular Japanese and European motocross and off-road models (Honda CR/CRF, Yamaha YZ/WR, Kawasaki KX, Suzuki RM/RM-Z, KTM SX, Husqvarna TC). EBC contour rotors and Psychic contour-type front rotors are the wave-edge style that sheds mud and water and runs cooler than a solid round disc.
Don't reuse the old bolts. Rotor bolts are single-use on most bikes and take thread locker; the EBC high-tensile rotor bolt sets on this page are sold in 4-, 5- and 6-piece sets to match your disc's bolt pattern — count the holes on your old rotor before ordering.
Finish the job. A new rotor should always get new pads so the two bed in together; find them in Brake Pads & Shoes. If the lever feels spongy after the swap, look at Brake Lines, Brake Calipers and fresh brake pins while the wheel is off. Free shipping on orders $50+ (Lower 48).
