If you really want the engine to run cooler, throw out the stock cams, replace them with several of the aftermarket one available, add a proper tunable esm, and get the damned thing tuned by someone who actually knows how. Plenty of qualified tuners around, check out their sites.
Air cooled engines require a lot more tuning and specific fuel % to keep them running as intended. HD has had a wonderful time trying to save their beloved V twins, and now run so lean, with all the attending problems. I've heard several reports of stock engine running a 16/1 fuel ratios as they come from the factory. HD has done all kinds of trick to get these engines to pass emissions, none are a benefit to the owners.
I have an S&S T124, the hottest I've ever seen in 7 years is 230 deg, once! Stuck in traffic in Sturgis for 45 minutes! It normally never makes 200 deg oil temps. My 95" TC with 93hp/98t never ran over 210!
fwiw twinotter