1984-1999 Overview of the Harley Evolution Engine

Duration: 3:27

Oh Evo, how I love thee. Dennis here from Fix My Hog and I own a 1984 FXRS and love it. The Harley Evolution engine helped bring Harley-Davidson back from bankruptcy. This was a major design advance for Harley-Davidson in many ways, the Harley Evolution engine is most distinct from earlier Harley-Davidson engine designs by due to its reliability, oil tightness, and ability to run hard under all circumstances, thousands of miles farther than any of its predecessors. If you ride an Evo, check out what makes your ride special. If you are riding a Twin Cam, check out the technology that has been upgraded. Bob gives us an overview.

-Rubber Mount was a technology breakthrough
-Rear Axle – Castle style nut and cotter pin
-Rear Belt is wider
-Swing Arm design
-Outer Primary Cover
-Stator Retainer
-Speedo drive cable
-Rotor Design
-Wheel Bearings
-Rear Caliper
-Rear Axle Adjusters

Next Video: Evolution Rear Brake Caliper & Pads

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3 Responses to “1984-1999 Overview of the Harley Evolution Engine”
  1. Larry

    I have an 1984 softail, gear shift lever will not return do I have to pull tranny

  2. Brian Daniels
    Brian Daniels

    I have an 85 wide glide. I know that the first few years they would dump oil when not started and ran for a few days. I don’t remember my 86 sporty having this issue. What can I do to slow down or stop this issue?

    • Customer Service
      Customer Service

      Hey Brian,
      Here’s what the experts had to say about your question:

      Try stretching the check ball spring in your oil pump. Stretch the spring 1/4″ longer. Sometimes this corrects the condition, sometimes this lessens the condition, sometimes it doesn’t help at all. If the issue persists, you may want to consider replacing the oil pump.


      Fix My Hog Expert