Things can get messy when your chopper dream collides head-on with chopper reality. It's easy to fall in love with a chopper's bad-ass style and muscular charm, until you twist the throttle and careen ...

The rocker arm employs the use of a fulcrum or pivot to increase the cam lift by a given ratio. That increase in lift is the result of moving the pushrod pivot point closer to the fulcrum. That ...