Keeping your Harley Cool Harley Davidson engine oil cooler kits - Screamin’ Eagle synthetic motor oils | | KEEP YOUR HARLEY COOL | We highly recommend that you call us regarding an oil-cooler set up for your bike. | Reduce the maximum engine operating temperature by as much as 20ºC; it can make all the difference. | Okay, so the Harley Davidson engine is air cooled. It has roughly 3 liters of motor oil in the tank to keep all the parts in the engine running in harmony and friction free. | | There is nothing. | And then on top of that, when you are pack riding or riding in a group slowly while virtually no wind is available, what keeps the whole engine cool? | The engine is often over looked while the bulk of your budget is being spent on chrome, clothing and image. | Adding a simple inexpensive oil cooler to your motorcycle, not only keeps it cool but it goes better too. | |  | | | | |