This e-bay item looks like the belly pan I have on my RS solo, if any body wants one:-

http://www.ebay.co.uk/itm/BMW-K100RS-motorcycle-Under-engine-panel-/181220144749?pt=UK_Motorcycle_Parts_13&hash=item2a318ff66d

Paul.

Thanks for the heads-up Paul. I think that I'll watch that. I missed a BMW one a few days back and the other one on ebay is listed at £150!

How does this type fit?

Mike,
At the rear, there are two tabs on the fairing which line up with two extended sump/cambox studs. These tabs are drilled for a 6mm bolt.
 At the front I fitted two captive nuts behind two holes that I drilled in the BMW rad cover fairing. I think the original instructions suggested just self-tappers.  

As mine was in primer, I profiled the top edge to make a neater fitting to the side panels before I sent it to Dream Machine and asked them to do a design to match the rest of the bike.

Good luck if you bid!

Paul.