All the guys I ride with down here have um, and to tell you the truth, I think they're :gay They have um installed for $75.00. I can think of other things to use with that money. A major problem with um is, you can't see um. When some one signals to turn, unless you'r really paying attention, you'r going to end up kissing their tail section. Even at night, you can't see um. I think they are a safety hazard.