No, not all KTM motorcycles share the same engines. KTM (Kronreif Trunkenpolz Mattighofen) produces a wide range of motorcycles with various engine configurations and displacements to cater to different riding styles and purposes. KTM offers motorcycles with single-cylinder engines, V-twin engines, and even parallel-twin engines.
For example, KTM's popular Duke series includes motorcycles like the KTM 125 Duke, KTM 200 Duke, KTM 390 Duke, and KTM 790 Duke, each featuring different engine displacements. Similarly, KTM's Adventure lineup, which consists of adventure touring motorcycles, includes models like the KTM 1290 Super Adventure, KTM 790 Adventure, and KTM 390 Adventure, each equipped with different engines.
KTM also produces high-performance sport bikes, motocross bikes, and off-road motorcycles, and the engine specifications vary across these different categories and models.
While KTM does use some common components and technology across its lineup, the engines themselves differ based on the specific motorcycle model and its intended purpose.