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Evolution Industries' Sportster Open-Primary Beltdrive System: Get Evol

By George Daniels, Photography by George Daniels
  • Evolution Industries Sportster Open Primary Beltdrive System
    The primary cover was next. The chrome cover really adds a mechanical look to the beltdrive.
    Evolution Industries Sportster Open Primary Beltdrive System
    The primary cover was next. The chrome cover really adds a mechanical look to the beltdriv
  • Evolution Industries Sportster Open Primary Beltdrive System
    The cover and two belt guards were installed using the stock bolts and blue threadlocker.
  • Evolution Industries Sportster Open Primary Beltdrive System
    Next, the clutch cable was installed, along with the coupler, bearing, clutch adjuster nut, and the lock-plate spring.
    Evolution Industries Sportster Open Primary Beltdrive System
    Next, the clutch cable was installed, along with the coupler, bearing, clutch adjuster nut
Evolution Industries Sportster Open Primary Beltdrive System

With the derby cover in place, the installation took an interesting turn when LifeStyle Cycles' owner Junior decided he wanted to extend the left foot control out 1 inch. This extension will give the controls better ergonomics, help strengthen the shift-rod connection from the shifter, and take stress off the connection to the shift arm to the shift linkage. So Anthony removed the left side control. To accommodate the extra 1-inch spacers, new bolts were acquired that were 1-inch longer than stock. With a four-point connection, there's no worry about lack of strength on the controls.

  • Evolution Industries Sportster Open Primary Beltdrive System
    To keep shift-linkage curvature to a minimum, a 1-1/2-inch spacer (not included in the kit) was used between the shift arm and the front of the linkage.
    Evolution Industries Sportster Open Primary Beltdrive System
    To keep shift-linkage curvature to a minimum, a 1-1/2-inch spacer (not included in the kit
  • Evolution Industries Sportster Open Primary Beltdrive System
    Here's a comparison between the stock primary and the new 3-inch beltdrive (above, and above right). As you can see, it's an incredible difference and gives the Sporty the open-belt look that's popular with all the Big Twins. You'd be hard-pressed to find a more innovative and impressive kit anywhere.
    Evolution Industries Sportster Open Primary Beltdrive System
    Here's a comparison between the stock primary and the new 3-inch beltdrive (above, and abo
  • Evolution Industries Sportster Open Primary Beltdrive System

Sources

Evolution Industries
(909) 594-7969
www.evoindusa.com

By George Daniels
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