Timing a '79 Sporty

Well, it finally happened, and I'm working on something built in the Seventies. It's a 79 sporty that someone else pulled apart, and now I'm "pickin' up the pieces". Next step is timing the bugger. It's got a solid state timer ass'y, no points, and I believe the black lump on the timing plate said "dyna" something. Bike's not here so I can't run outside and look. Question is how do you do the preliminary timing on this system? How do you set the mechanical advance to the right static position on the cam so the darn thing will at least start? My only sporty book is for 70-71, so it's a little old.
Thanks,
Dr Dumbfounded Dick

Dr. Dick
This instruction sheet should be pretty close. This is for the single fire setup, but the dual fire times the same way.

http://www.dynaonline.com/english/instruct/DS6-1.pdf

Wow, fast service. Thanks Curt, much appreciated. Just what I needed to know.
Dr Dick

You just caught me at the right time. I've installed lots of these Dyna-s ignitions. One thing you need to watch is that the flyweight holes are not wollered out. When they get loose and rub on the back of the timing plate it creates steel dust. The dust gathers on the trigger magnet and will burn out the module. That's the only failures I've had from these. I've had customers doing self installs that wired them up wrong and fried the module, though.
Lately, I've been using the Mallory optical ignitions. They are less expensive than the Dyna-S and I think they kick start easier.

Thanks for the additional info. I'll check all that out before installing.
Thanks again,
Dick