3M makes a clear film, I'm sure you've all seen it on the leading edge of car hoods, etc. It's commonly referred to as Clear Guard, clear protection film, or Scotchgard™ Paint Protection Film. It is specially designed to be almost invisible, and protects the paint from getting chipped by flying deris such as stones, etc.
Most companies who do mobile decal striping do this service. Contact them in the yellow pages, on-line, or get a hold of your local body shop. I'm sure they can hook you up.
I bring this about, because there are many needs for motorcycles to have the leading edges protected as well. Such as the fronts of gas tanks, frame down tubes, fairings, hard bags, etc.
Heck, there are even specialized do it yourself kits out there for a wide variety of motorcycles. see: http://www.empireclearshield.com/site/1325795/page/667887 . This site has a place where you can find your particular ride, and order a kit made especially for it.
Keep the paint shiny, and keep the shiny side up!