Hi - Another option for this, which I'm considering, is to remove the RHS brake disc, caliper and 'bridging' hose (using the RHS banjo bolt to secure the sinlge hose from the master on the remaining (LHS) caliper). Then yo'uve got one disc, like pre '04 Adventures, and it's a fimple enough thing to just fit the high muguard and some neoprene stanchion protectors.
That's my current plan - the consensus on the AdvRider forum seems to be that off-street at least one disc is at least as good as two?!
Cheers - Andy
(04 KTM 640 Adv 'Naartjie'/11 KTM 990 Adv 'Tsumeb')