How do you like that cdi box enhancer positives and negatives ?I have an 06 650V2 that I’ve owned since brand new. Couple years ago I added the CDI enhancer and a jet kit, noticible low end difference but runs just as hot now As it did before. FYI, leave the pilot jet stock otherwise it’s way to rich at idle and will load up if you let it sit idling for any amount of time.
Someone else was on here a couple weeks ago complaining about heat, nature of the beast.
BTW, those plugs look fine to me, definitely not lean.
Lean jetting is my first guess...have you put a pipe or performance air filter on it? I had the same probel with mine, but installed a Dial-A-Jet along with the pipe and air filter and its a beast! As an extra measure I also got a thermal exhaust wrap from the auto parts store and also fabbed a heat shield for the header pipe. They do make universal kits for heat shields, but I used one I found off an old dirt bikeI have 05 Arctic cat 650 atv the exhaust gets Really hot on the left side For my leg any suggestions ?