hi.
i just saw a bike like your for sale on autoscout24.de
in description says it is stolen, and the characteristics of the bike.
for me it seems to be matching with your description.
so, here is the link, take a look at, maybe it's yours: Motorrad: KTM, 690 SMC, Benzin,
p.s.:i'm waiting for you to confirm that this is your bike or not.