Mystery Designs Harley Drive Pulley

From Mystery Designs comes a new rear drive pulley, made exclusively for 2007 and 2008 Harley-Davidson models. The pulley has a 72-tooth design that helps bring more torque to the machine and addresses the problem of the overly tall gearing on stock Harley big twins, the company says. Benefits are quicker acceleration and better bottom-end performance.

Contact: Mystery Designs, 214-467-0991,



  1. Do I need to use a different drive belt or will stock work ie length

    • Honestly I don’t know what they recommend, you would need to call them. They don’t seem to give all those specifics on the site. I would think stock length should work.

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