Your motorcycle spark plug wires will wear out over time and this can cause poor performance, including misfires, bad gas mileage and even voltage leaks. Generally, we recommend replacing motorcycle plug wires every 30,000 miles or so, but if you're experiencing combustion or electrical issues then they may need to be replaced earlier. Shop a variety of high-performance products -- including spark plug wires that light up -- from top brands like ACCEL, Blue Streak, Hot Fire, Magnum, Scott Performance, Sumax and Twin Power. If you're experiencing issues with your current or new wires, be sure to give our free tech support line a ring and our moto experts will help you get to the bottom of the problem. While you work on your electrical components, be sure to check out Motorcycle Spark Plug Accessories and Motorcycle Spark Plugs to keep your ride running smoothly.