The name KTM 525 SX is derived from the names of the company founders, Ernst Kronreif and Hans Trunkenpolz, while the third letter represents the geographic location of the KTM factory, Mattighofen in Austria. A new high-tech production line was brought on line in 1999. This new facility brought about superior levels of quality control and set the groundwork for the sales success that KTM now enjoys.