Map Switching PROCOM Performance CDI for the Suzuki LTZ50 (06-09) & LTZ90 (07-09) offers a rev limit increase of up to 1,500RPM over the stock rev limit or the ability to remove the rev limit completely. The unit comes with 3 rev limit settings and 3 PROCOM Performance timing curves to select from (total of 9 combinations). The user simply turns the dial on the outside of the CDI box to the desired position to select which configuration the CDI box will operate with. The combination of timing advance and rev limit increase yields a noticeable increase to horsepower and torque over the stock CDI. This CDI box is a direct plug in replacement CDI. Simply locate and remove the stock CDI, and plug the Procom unit directly into the wiring harness, no modification needed. Suitable for stock and modified machines. We cover all our PROCOM Performance CDIs with a full one year warranty. Maps Included: Position 0: Same as OEM. Position 1: PROCOM Performance timing curve 1 with raised 1000 RPM Rev. limit. Position 2: PROCOM Performance timing curve 2 with raised 1000 RPM Rev. limit. Position 3: PROCOM Performance timing curve 3 with raised 1000 RPM Rev. limit. Position 4: PROCOM Performance timing curve 1 with raised 2000 RPM Rev. limit. Position 5: PROCOM Performance timing curve 2 with raised 2000 RPM Rev. limit. Position 6: PROCOM Performance timing curve 3 with raised 2000 RPM Rev. limit. Position 7: PROCOM Performance timing curve 1 with NO Rev. limit. Position 8: PROCOM Performance timing curve 2 with NO Rev. limit. Position 9: PROCOM Performance timing curve 3 with NO Rev. limit.