View Full Version : knucklehead temps?

05-11-2009, 11:11 AM
Anyone have any insight as to head temperature ranges for knuckleheads?

My head is running at about 375 degrees F near the spark plug. That is exterior head surface temp immediately after normal operation (15 miles easy ride at a variety of speeds)

rear head is about 5 degrees wrmer (to be expected)

Temp taken with a quality IR gun.

My 1995 Harley with Aluminum heads runs at 280 and my 2007 Harley (with lots more pollution control and leaner factory setting) runs at 365.


05-13-2009, 04:48 PM
If you have the ir gun......then you have way more insight about it than anybody here.