KTM (Kronreif Trunkenpolz Mattighofen) is an Austrian motorcycle and sports car manufacturer. KTM engines are primarily manufactured at their main production facility located in Mattighofen, Austria. The company's headquarters and main factory are situated in this small town in Upper Austria. KTM has a rich history in motorcycle manufacturing and has gained a reputation for producing high-performance motorcycles and engines. However, it's worth noting that KTM has expanded its operations and established production facilities in other countries as well to meet the growing demand for their motorcycles worldwide.