1978, 17k miles, original motor is healthy, good compression. I cleaned the carbs, had to buy new brass floats (China). I got a carb rebuild kit with a new bowl gasket, new float spring pins. I am running UNI filters with red prefilters (oil sticky sprayed) and using Norton commando mufflers. These pipes are loud, you can see straight through them. I think it sounds good though! I am using iridium NGK's, and fuel filters. 91 octane premium gas, and a electrosport solid state reg rec. So with aftermarket intake and exhaust maybe I am getting a little more backfiring than desired. Maybe less power. If I were to go on eBay (or other site) and buy some jets what should I buy?