will a screen from a k1200 fit on a k100 as i wish to fit a low screen any ideas please as i dont want to cut down my tall screen chees Geoff

No K1200 'screen of any model will fit a K100RT. But there are a few windscreen manufacturers still selling replacement 'screens of various heights specifically for a K-RT. These are mainly in the US, but there may be a UK or Euro-based option too. Try Gustaffson's at www.bikescreen.com/search.asp, then type in your K100RT and then BMW. He will custom-make a specific height for you. Takes ages, last I heard. Motorworks UK have a few new and secondhand listings too.

Geoff, MotoBins as well as Motorworks have replacement screens. Just have a look on their websites. I think James Sherlock as well.