By lines, you mean cables, right? Yes, you can use your stock ones, some people will scream about it, but you'll have to reroute them in front of and then in between your triple tree and under the tank. For your clutch cable, up and over your headlight and then through the triple tree and under the tank. If you need to move your brake line, you can slightly loosen your banjo bolt and move it a little -- maybe need to bleed the brakes after. And you can tuck your excess wiring behind your headlight bucket.