I think, if I remember correctly that the cross bar is hollow. Just cut to length and flatten the end in a vice, drill a new hole and fit.
I got a shorter one from a mate where I keep my bike, but on my first Ten I drilled holes in that bar for the GPS bracket and it was definately hollow.
Well done with the KTM handguards, I also use them but on my second Ten I have a set cut down for underneath muffs and a new pair for the summer.

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