K5 Series The K5 sintered compound is optimal for off-road motorcycles and ATVs. It is recommended for riders who demand great off-road stopping power and brake pad durability when riding on tough off-road terrains. The K5 series is designed for low abrasive interaction with the rotor long life and self-cleaning capabilities necessary in off-road riding conditions. Friction materials contain metal-ceramic with a sophisticated bronze-graphite and full-metal mixture formulation with fine friction particles to achieve optimal friction properties. Fits: CF Moto Z550 2016-2017 Z6 2015-2016 Z6EX 2015-2016 Z6EX Terracross 2013-2014 Z8 2015-2016 Z8 EX 2017-2018 Z8 EX Terracross 2016 Z8EX Terracross 2014-2015