The CRF450X comes stock with a headlight. All I had to do is tap into the headlight wire behind the "number plate." On my bike I believe that is a 35W or 40W line, which is real close to what the handwarmers use. If your bike doesn't already have a headlight, I don't know if this would work for you. Most handwarmers say a 40W 12v power source is required. Take a look at a wiring diagram for your bike and see if there is a 40W line, and tap into that.