It is entirely possible you have oil leaking from the black bolt. Those bolts are just caps, and they are seated with o-rings (which tells me oil gets up there). So I bet that o-ring is kaput. Part # 36 and 37 - 2018 KTM 1290 Super Duke R Black OEM Parts, KTM Parts Pro Also - If oil is somehow wicking up the cylinder head bolt, you have bigger Published Jul 26, 2017. KTM. When you add a Gran Turismo suffix to the name of a bike, it had better be more than just a streetbike with a set of bags, and it seems that KTM agrees. The new-in Find the trade-in value or typical listing price of your 2019 KTM 1290 at Kelley Blue Book. $3,690-$4,690 The KTM Duke 390 standard street bike is the only non-Japanese sportbike in the top 10 8IsHl.