KZ-1000/Z1-900 Swingarms

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Kawasaki KZ-1000/Z1-900 Aluminum Swingarms 

For over 35 years, Trac Dynamics has been setting the world wide standard in custom swingarm manufacturing. Here at Trac we build more aftermarket swingarms than anyone on the planet, and for for three good reasons: Quality, Performance, Value. Our quality begins in the manufacturing process. All arms are made "in house" at our facility using our exclusive bridged extruded aluminum alloy material along with precision cnc machined billet components. These parts are then hand fit and assembled using the most technically advanced welding system available today. The performance of our products are legendary, since the mid 80's racers around the world have trusted the name "Trac Dynamics" to give them the advantage they need to perform at the top level of their sport. Our value speaks for itself, when you make an investment in the customizing of your motorcycle, rest assured you are getting the most for your money. Here at Trac our Swingarms are built to stand the test of time, and your satisfaction is always guaranteed!

Standard Alumi-Trac Swingarms are available in many lengths and come complete with:

  • Rear axle and adjusters
  • Bearing kit
  • Chain guides (sliders)

Your bike model not listed? Call Trac at 661-295-1956 to see if we can build an arm for you.


  • "Length over" represents the maximum the swingarm will adjust over the stock swingarm for that year and model. Standard Trac swingarms usually have between 2 and 3 inches of adjustment, so a 6 inch over arm will be adjustable from approx. 3 to 6 inches over stock.

  • Please allow allow 5-8 weeks for delivery of black swingarms. 

  • In a hurry? Order your arm "BARE" for the quickest delivery times.

  • For racing applications, please visit our SUSPENSION section to get the most out of your new arm.


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