I have been dealing with this issue for over a year now. I got a '07 heritage classic and put rush 2.25 on it, v/h fuelpak,(yes, a correct dial in code) arlen ness big sucker stage 1 intake, and changed the oil to ams synthetic oil. i'm still running 240 deg. on a 70 deg. day. it's never went into parade mode, nor has it got so hot that it causes scabs on my thighs, but its a air cooled engine hot on my legs...i can deal with that...but what i cant deal with is a melted motor.last year the engine oil temp. got about 300deg. i read a thread once about the slip-ons being bigger than 1.75 wont make backpressure that you need to allow your engine to run properly. and cause you to run hot. the harley shop thought this was incorrect. what is your opinions on this problem? any help would be greatly appreciated. thanks.