As Claudio said I think KTM are dispanding all the on road bike range they will sell the Husqvarna off road bikes as thats what KTM know best.
I wouldnt be put off by the lack of spares I belive some of the BMW engine parts can be used on the 900/650 bikes.
Can you get the bike cheap or do you already own it ? (if so then you know your bike and it may still make more sense to sell it and buy something else).
I would think there are much more suitable bikes available, How much power do you need to RTW ?
When you look at the plus the engine and then the minus, the cost of new bike plus conversion plus lack of accesoroies available and then the possibility of spares you would be better off spending your money on something else.
Given that they are only really suited to road travel you could take just about any road bike from a Fireblade to a C90.
any which way you go have fun