I have been running a bell on my bars for about 4000 miles. It's ammussing as hell! When I pass the Harley guys all dressed up in their leather looking hard I ring my little bell. They look over looking tough, I nod and then I see them crack a smile and giggle like a little school girl. When I'm at a stop and a hot chick is next to me I ring my little bell. The girlies love it. The most noticeable enhancement about running a bell is the change in HP!