Kronreif, Trunkenpolz, Mattighofen
the first two K and T stand for Ernst Kronreif and Hans Trunkenpolz. the M stands for Mattighofen which is the location of the KTM manufactoring facility in Austria.
I lived about 10 minutes from there in a town called Braunau am Inn. If you are ever in Austria and have the chance, go check out the facility. The tour is spoken in german but its still neat to see everything being made and put together.