My two cents. I made a set of lowers out of clear plastic. Not the finished look I was looking for. Most important, in hot weather I had coolant overheating. I didn't restrict the air in the radiator. The lovers on my forks must have changed the air flow enough in the front to cause high engine temps. Hard to believe but as soon as I removed the lowers, the coolant issue was solved. On a good note, the lowers kept the cold and rain off my legs.