Yeah, that was the very first mirror I bought. it never worked good for me. My wallyworld speedo worked good at first too, but after awhile, it would reset itself every time I drove the bike. You can get a snap on choke core at radio shack for around 5 bucks. It snaps on to your spark plug wire and prevents it from throwing off interference. But its up to you. That was good thinking, buying another kit for spare parts.