Posted in the topic 
Cylinder Head Cooler            in the forum 
Biker Chat           
          
            September 4, 2013 12:51 PM PDT          
         
        
          I live in South Carolina and went on a trip to Charleston in stop and go traffic on a 100 degree day. I had the rear cylinder disablement engaged on a 09 road king 103 kit with cams se air cleaner and pipes. I use synthetic oil this motor was knocking and pinging so bad I thought we would be trailering home.  When I got home I did some research and saw some cheap looking fans. I came across the jims fan installed myself, came with great instructions. I ride everyday in the heat and this fan kicks on at 140 degrees. No more pinging while leaving a traffic light and the rear cylinder disablement is a thing of the past. Best money I ever spent. I bought it on amazon.