The Duke was KTM's first street bike, and first supermoto, having previously made only off-road and racing motorcycles. In 1998 KTM introduced the 640 Supermoto, so the Duke line became a more street oriented standard or streetfighter, while retaining some off-road characteristics like a relatively long suspension travel. In 2005, KTM introduced the Super Duke to expand the range above the middle Duke, initially 999 cc and later growing to 1,301 cc.PP Tuning performance parts for KTM Super Duke 990 (2006–2013) rearsets, adjustable brake and clutch levers, clip-on handlebars, protectors etc. are produced from highly resistant materials. This ensures their longevity.