The system I use on my Hard Tail(EVO) isa Dyna single fire. It is DSK6-2 Ign. w/DC10-1 Coils(2) When talking with Dyna about a problem on the original Dyna single fire I had a single coil with dual pk. ups from the Ign.I gave me problems with the coil.They did not recommend a single coil unit,theirs or aftermarket.I put the new DC10-1 coils on about 3 yrs ago,no problems since. When I looked at the web from page from Hopple it looked the same as the Dyna. Are you running a single coil or dual coils. I couldn't find out if the DC10-1 was 3 or 5 ohm coil on their web page. May be something you could look at though.