My R1150GS "ETOPS" accessory page
On the top picture you see my +3" / +8cm MDI screen. It has the same shape as the stock screen only about 3"/8cm higher and is available in clear, light smoked and dark smoked. I have the light smoked version which goes very well with the black colors of the bike and black painted custom cut glareshield behind the screen. For my 6'3" (1.90m) with 34" waist it lifts the turbulence just enough to not blow it straight in my eyes like the stock screen did. No decrease in noise, just able to ride with the visor open longer (comfortable enough up to 100 km/h).
Below you see the Bagster tankcover. I have the "Alpha" tankbag which clicks right on. A raincover is built into the bag, the bag is relatively big, expandable upwards and has a large mapholder on top. Because of the tankcover it is secured very stable even when fully loaded. I get a lot of compliments on the looks of this cover alone, it's also a great scratch protector.
Below you'll see the electromagnetic Fiamm horn with which I replaced the stock horn. The horn is the 410 Hz Fiamm AM80. It is the lower tone unit from the dual horn set (one 410hz, one 510Hz) that's standard on the K1100RS and other older K-series BMW's.
The horn fits right in the spot of the stock horn, I turned the horn towards the rear. In that position it also points downwards so that it doesn't collect water and dirt. There is about half a centimeter of space between horn and shock. Curiously the plug that goes into the stock horn isn't the same as the two slider plugs that were standard on older BMW's and other bikes (and cars). So you'll have to cut of this plug and replace it with slider plugs you can get in any hardware store. With the horn facing forward the remaining wire isn't long enough to reach the slider contacts, so I inserted some extra wire with plugs in between.
You can get the horn by going to your local BMW motorcycle dealer and asking for the 450hz / lower tone version of the horn that's standard on the K1100RS. It costs around €25 EURO. Buy some wire connectors and electric wire from your local hardware store (and a pair of wire connector squeezers) and you'll be all set up for a major horn enhancement with minimal cost and hassle.