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