In part one of this story, we left off with removing the stock pulley. Now we’re diving into the primary itself.

If your riding primarily involves going from point A to point B without much concern for how fast you get there, belt drives make the perfect method for harnessing the motor’s power and transferring it to the rear wheel. They are clean, quiet, and require very little adjustment. But if you have some serious power behind your punch or you need that instant response, a chain conversion might be necessary. Our resident test rider, Troy Hoff, was building a purpose-built stunt 1998 Dyna and needed a more snappy response to help with his drifting, wheelies, and burnouts. The conversion itself is relatively straightforward, using PBI offset front and rear sprockets along with a sturdy chain from RK Excel. For the wrenching, we took Troy’s bike to one of the best mechanics we know, T-Rod of T-Rod’s Speed Shop in Anaheim, California. Please note, this is intended to be an overview only. Always consult a manual for step-by-step directions.

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Attach the new rear sprocket and torque the bolts to spec.

Words and Photos: John Zamora

Next, drain the oil from the primary into a catch pan.

Words and Photos: John Zamora

Carefully remove the outer primary and set out of the way.

Words and Photos: John Zamora

Loosen the front primary sprocket assembly but do not remove yet.

Words and Photos: John Zamora

Remove the chain, clutch pack, and sprocket as one unit. Then loosen the starter jackshaft in order to take off the inner primary.

Words and Photos: John Zamora

After carefully taking off all the retaining clips and removing the bolts, the inner primary was next.

Words and Photos: John Zamora