for what the gastank or the gearbox?
if for the gastank then a good name brand 2 stroke premix. Mixed at about 40:1
if for the gearbox there are several options. Lots of guys swear by using ATF is the gearbox, others use motor oil, and others use gear oil. I have had good experanice with ATF in the gearbox, and honda's gearbox oil looks, smells, and feels like ATF. However you can't go wrong with the manual suggests. Call your local honda dealer and ask them
2007 KTM 990 SUPERMOTO
2007 KTM 950 SUPERMOTO R