The new HDs do have a heat management system that I think has different stages depending on temperature of the oil which is all controlled through the ECU. The problem with today's bikes is like every other manufacturer...they lean out the bikes at lower rpms to get the emissions down. So just like our bikes(blue pipes - remove AI), the new Harleys run better and cooler after a SERT or Power Commander install and re-map. Of course there's also aftermarket air cleaners and more open pipes to tune the system to take out the lean running conditions and give them more hp and torque. Yup, it's the Harley tax.