I installed a Dyna DS1-2 on another CB750 and it worked just fine. Timed easily, stayed timed and removed the points.
I almost fell prey to the Dyna sales hype, but I was able to resist the dark side back in the 80s, and avoided that barely adequate product.
After I saw the Hondaman analysis of the Dyna-s operation, I really felt proud of myself for such personal fortitude.
You see, with original points/points cam, the coils are only allotted power for 190 degrees of crankshaft rotation, while the Dyna-S drives coil power for 330 degrees of crank rotation.
So, for whatever coil you use, the Dyna forces 57% more power to be used by the ignition system.
The CB750's 210 watt alternator usually has this to spare, along with a 14AH battery, and can cope with adding a piggy electrical component or two.
The CB350F, CB400F, CB500, and CB550 only have, 150 watt alternators and 12AH batteries. The added power draw places them much closer to the edge of acceptability, and demand that the entire charging and electrical system be working at max efficiency.
Did I mention the coils will run hotter, fail sooner when dissipating those extra watts, particularly in hotter climes?
Did I mention that the spark voltage/current will be exactly the same as with points, unless you increase the spark plug gap?
Still, some feel the "convenience" of not utilizing knowledge and the small effort to maintain points is worth paying for a poorly engineered product.
Don't feel bad about buying or owning a Dyna-s, though. You're in the same company as those many buyers of Pintos and Corvairs attracted by that "new" and "modern" smell. /jk
In case you are wondering, yes, I do have a grudge against Dyna ! As I do against any poorly engineered product made popular by clever advertising, and mythical folklore, rather than bona-fide technical merit.
It's actually rather a pity, as they got the reluctor trigger portion of it right, then stopped the electrical engineering to make sales a priority, and cash in on half the work they did right.
But, that's just my opinion, of course.
Cheers,