No, but I have the opposite problem My Zip Ty is hard to turn. I think it is a machining tolerance issue. Send it back for a replacement unit. It should have the red knurled knob (version FS01). Hey Indy, I checked mate. I do have the one with the knurled knob. Do you think I could just have a "duff" one. I thought about callinng Zip-ty as I have the receipt and see if I could get another one sent out? I do like the ability to adjust my fuel mixture if needed. Also, thanks for your help with my jetting, with your help and the exhaust, love the way my bike runs!