Yamaha Cdi Box

*includes duplicator circuits, altered ignition advance curves and increased rpm redline
*enhance overall performance when installing a high-flow jet kit
*criteria for determining performance enhancements include type of engine (2- or 4-stroke) and if the machine has a pulse-generated ignition or battery-supplied ignition
*can also be used to replace defective cdi box on stock machines
*increase the spark or multiply it per application