I don't know that you can say he's too big.... air-fuel mixture is all relative to air temperature/density... which is also dependent on altitude as well... Unless you've actually ridden his bike lol and can verify that his jet is, in fact, too large for his current setup.. you can't really claim that..
Runnin' hot. Check for air-leaks. which could also throw your jetting off at certain RPM or all the time or whatever.
Also, with the SHA's, because there is no actual needle, it is possible (and generally true) that if you are running perfect in one area (WOT or idle) you're running lean or rich somewhere else...
I'd just check for air leaks, and run a bit juicy on both the oil, and the jet for a while...
Hot generally = lean... determining WHY you're lean is the fun part lol