Dynatek 2000 Digital Ignition System - HD1 (7-Pin Enhanced) DD2000-HD1EP Digital ignition system which may be triggered from the stock Hall effect pick up Can be used with either 1 ignition coil for dual fire mode or with 2 coils for single fire mode Allows you to tailor the advance curve and rev limiter with 4 built-in advance curves and 4 independent rev limiter choices from 6000 to 7500 RPM HD1 70-99 H-D (exc.