Hello everyone! Brand new to the forum and the XJ line of bikes. I bought a used 81 XJ 650 a few weeks ago and I have been going through the entire bike. I have yet to hear the bike run because I want to get everything sorted out first. It was in pretty bad shape and so many things were backwards or wrong with it from PO. I am slowly working it out. I have cleaned and separated the carbs, new throttle shaft seals ( thanks x4forever!), jets etc. The problem I am having is the carbs were originally attached to a 750. The jets were for a 750 so obviously larger sizes. Ive already replaced the main and secondary fuel jets and needles etc back to stock recommendations for the 650. The pilot air and secondary are 225 and 80 that are in there now. My concern is how well it run with the larger jets. Could I just color tune it and move on? Are those air jets only used for idle mixture? All of the other jets , compensater and other fuel jets match with the 650. Thank you so much all and I look forward to a long membership!