KTM Two years later in 1962, Hans Trunkenpolz also died of a heart attack. His son "Erich Trunkenpolz" took charge of the company's management. As the company continued to expand, the workforce totaled 400 in 1971, and forty years after it was founded, KTM was offering 42 different models. Besides, KTM was able to produce motorcycles for the racing industry. During the 1970s and 80s, KTM also started to develop and produce motors and radiators. Radiators sold to European car manufacturers constituted a sizable part of the company's business in the 1980s. In 1978, US subsidiary "KTM North America Inc." was
MBK (Scooter manufacturer) scooters became the company's core business. Over the past decade MBK scooters have played a major part in the European scooter sales boom. Market leader in France, MBK is also a best-seller in Italy with significant stakes in the German, Belgian, Swiss, Portugal, Greek, UK, Irish, Austrian, Spanish and Finnish markets. One of the company's more popular model range is the MBK Booster. It is sold with a 50cc or 125cc motor. MBK (Scooter manufacturer) MBK (), a subsidiary of Yamaha Motor Company, is a French Scooter manufacturer, based in Rouvroy, Picardy, France. The company was first established in 1923