Got this for riding my trials bike (2008 Beta 270) as a secondary safety device to cut the engine off if/when I get separated from the bike. First day out we proved it worked as I came up a little short on a slippery and very steep hill climb - the bike made it to the top but I didn't as I went back down the hill. The engine quit as it should have. Have ridden with it for a couple of weeks now and really don't notice it when riding. Anyway, my only nit pick is the mounting screws require a 9\64" allen wrench and all my bike tools are metric so I had to go buy an allen wrench - would have liked to have seen the wrench included.