Yeah the PCIII and other fuel management systems are for the fuel injected bikes like the 1800. The 1300s are carbureted. You want to look at jet kits in combination with an air kit and exhaust to change your A/F mixture, performance, and sound. Thunder Air Kits seem to be the general preference for actual performance increases. There are also Kury Hyperchargers, Baron's BAK, and the Xtreme Revolution and I am sure others.