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JIMS Force Flow Fan Cools Twin Cam & Milwaukee-Eight Engine

Availability: In stock
Item #: DK-JFF-BLK
Manufacturer: Jims

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DK Custom JIMS Force Flow Fan Cools Harley-Davidson Twin Cam Engine Wards Love Jugs



Cylinder Heads Cooling Fan


Fits All HD Twin Cam Models


Milwaukee-Eight Touring Models


Made in The USA!



  • Lowers Head Temps up to 100 degrees
  • Sleek Design includes horn
  • Your Choice of Black or Chrome Finish
  • Pushes High Velocity Air directed at Head Gasket Surface
  • Everything supplied for an E-Z BOLT-ON INSTALL
  • Step-by-Step Instruction Included


JIMS ForceFlow Cylinder Head Cooler. Whether you are running a big inch performance engine or rolling stock in traffic on a hot summer day, your air cooled engine will heat up.

Excessive heat and operating temperature can be an engines worst enemy. The patent pending JIMS ForceFlow literally forces the heat away from your engine by pushing high velocity air through the cylinder fin pack in a wide flow pattern, directed at the head gasket surface.

Powered by a cooling fan that was designed to cool brakes in NASCAR, the JIMS ForceFlow can lower head temperatures up to 100 degrees!

The ForceFlow can either be activated by a thermostat (included), or wired for a manual on/off switch (included).

This unique design also relocates the horn inside the ForceFlow’s streamlined housing, and gives the horn mount or “left side” of the bike a much needed new look. 


Fitment:  Fits all Harley Twin Cam Models & All Milwaukee-Eight Touring Models (including Trikes)

CVO & 120 Models require additional mounting hardware, which is an option while ordering

Choose from either Black or Chrome finish when ordering



Every week we see Twin Cam & M8 engines that have been destroyed by excessive heat.

Not only is the "normal" amount of heat uncomfortable, it:

Reduces Power & MPG

Increases Wear & Tear on the Engine

If you have not read the Report- "Why & How to Cool Down Your Twin Can & M8 Engine"

You can see it by clicking this LINK


Another option for Fans are the Love Jugs.  We do not sell Love Jugs Fans, but if you choose to use these, we recommend you get them at (346-800-7946) and if you mention that we referred you, they'll put a little something extra in your package for you.

The reason we mention the Love Jugs is because they are a bit more effective in cooling the engine than the Force Flow.  Both work well, so it may come down to a matter of which look you like best.




 "The last step in cooling my 103 down was a fan, & when I saw this Force Flow, I loved the look.  With it installed I am very happy with how well everything is working together to increase my power and the longevity of my motor.  btw, I also have all of your other parts for getting the heat down!  Thank you!" ~Stephen

Test Data on the Force Flow Fan


We put off testing this fan for well over a year.  We did not think it would work that well.

However, we were told that it did work well at cooling down the engine, so we took the time to test it on two different bikes.

An Air-Cooled 103 and a Twin-Cooled (wethead) 103.

We were pleasantly surprised by how well it works.

Even though both of these bikes already had a full compliment of Cooling Components installed, this fan did a great job of lowering the temps even more! 

To do the testing we removed the fans that were already installed on these bikes, and when we did, in certain situations the temps were getting too high for optimum performance, and getting into the range were accelerated wear was occurring.

By Switching on the Force Flow Fan the temps came right down into the optimum range....both for Performance and Engine Longevity.


Check out the data below-







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