Topic: Dyna Electronic Ignition Pros/poss. Cons?

[ANVkevin]

We'll amidst my pre-season bike overhaul, I'm thinking about pulling the trigger on a Dyna ignition for my '77 cb750k. I'm assuming someone, somewhere has bought one. If so, was it worth the 150 beans? Does it make a noticeable difference in performance/mpg? I guess I'm asking, should I buy one? 

[mick750F]

   I installed Dyna coils and electronic ignition in my '78 750F several years ago and they made a noticeable difference in performance. However, at this point having read so much about Hondaman's system, I'm seriously considering going back to points and using one of his transistorized ignitions. Best of both worlds!

http://forums.sohc4.net/index.php?topic=45909.0

Mike

[Jerry Rxman Griffin aka MuthaF'er]

My opinion FWIW, is it's the single best investment I have made on my bike. Setting and maintaining 2 sets of points drove me nuts and I never seemed to get them set together properly. Then they needed to be replaced. Paid to have it done afterwards. Viscous cycle. I installed a Dyna III and 3ohm coils in mid 80's. HAVEN"T TOUCHED IT SINCE!! Used to have to tune up my cars every 10,000 miles in the old days until GM came out with the electronic ignition. That is what convinced me. On the other hand, Hondaman DOES make a good product. Just depends on your preference and bank account.

[City Boy]

Hi.I would also highly recommend the Dyna 3 and 3 ohm green coils.I would add solid core 8 m.m. silicone jacket Taylor wires.These are installed on a daily driver 72 750 that I maintain.I don't see a noticeable performance gain but starting and idle and timing accuracy have improved drastically.   Rock On

[karmasic]

con
mine just died after 2600 miles. keeps dropping 2&3.

pro
great while it lasted.

going back to dyna for testing 

I would buy it again. and probably one more time after that. but then after that would be the last straw and i would give up and go to points. 

do a good search. lots of info here about them.

[fuzzybutt]

if you go with the dyna s and their 3 ohm coils make sure you get one of these http://forums.sohc4.net/index.php?topic=35781.0

[Gordon]

If you do buy one, don't pay $150 for it.  Z1 sells them for $118.

[eldar]

If your charge system is working right, you do not need the resistor packs, unless you are idling a long time in traffic but even then with stock coils you may drain your battery. I think a better option is to get an electronic voltage regulator which will allow for better charging. There is a thread in the last day that shows what parts of the electrical system people have replaced.

Not to take anything away from hondaman but if you are going to get 3 ohm coils, then keep it 3 ohm. There is no point in adding a resistor. At that rate, just get the dyna 5 ohm coils. I guess I feel that the simpler the system, the more reliable it will be.

[GodFather13]

I have the Dyna and love it. 2 years with absolutly no problems.

[OldSchool_IsCool]

IMHO, Hondaman Module with points. 

Should the Hondaman Module fail, I can be on traditional points in a minute or less and be on my way home.  If the points fail, they can be fixed with minimal tools or even replaced roadside with small, inexpensive, easily carried spares.

Having easily replaced plug wires is a nice feature of the aftermarket Dyna coils, but that's a separate issue from the triggering method.

[Gordon]

If the points fail, they can be fixed with minimal tools or even replaced roadside with small, inexpensive, easily carried spares.

So can the dyna-s.

[scrapvalue]

I have the Dyna ones on both my 72 and 76.
They are basically trouble free units. Cost about $120 each from Z-1.
Although, I do keep the original points plate in a small padded envelope and keep it in the saddle bag for long trips.
You do have to work on points sometime, but the good thing is, you can.

[OldSchool_IsCool]

If the points fail, they can be fixed with minimal tools or even replaced roadside with small, inexpensive, easily carried spares.

So can the dyna-s.

hehehe! I knew that was coming!  

[Gordon]

If the points fail, they can be fixed with minimal tools or even replaced roadside with small, inexpensive, easily carried spares.

So can the dyna-s.

hehehe! I knew that was coming! 

I don't like to disappoint!

Truth be told, I reside in both camps of the dyna-s vs. stock points discussion.  The 750 is dyna while the 550 is stock.  I like both for different reasons. 

[SOHC4 Cafe Racer Fan]

I installed the Dyna-S and 3.0 ohm coils on my 77 K7.  Drastic improvement!  Starts faster and runs better.

[Deltarider]

Drastic improvement!

Was that with or without renewing sparkplugs?

[eldar]

Without.
I put on a dyna s without changing anything at all and start up was half of what it was with points. I could generally start in about 2 seconds using the starter with points, that got cut in half. The engine also warmed up much faster. I also did not need to use choke for as then also. Throttle response was improved and even a bit of extra mileage was gained.

I am not the only one to report this. Many others after having done the switch report the same thing.

I know the Por-points people will say "at least you can do roadside repairs with points.", Guess what, you can with the dyna s too. You use the mechanical advance with the s s o if you are going on a trip, just like you pack tools, pack the points plate, takes about 10 minutes to swap it. But If your system works good, you are not likely to have issues. Many here has used the dyna 3 for the better part of 2 decades. Pretty good track record. The dyna S is derived from the 3 and does just as good.

Now when I did this, the points wre not "new" BUT installed about a month prior so they were not exactly old either.

[ANVkevin]

I guess my question comes down to weather I should go mechanical trigger (hondaman's system) or magnetic triggering (dyna S). Either way, I'm assuming I should also upgrade my coils either route I go?

[TwoTired]

Either way, I'm assuming I should also upgrade my coils either route I go?

Um.  For what reason?

[ANVkevin]

None I suppose. Dyna will work with stock than? I guess it's a "should I get new" kind of thing. Stocks seem to be working fine.

[TwoTired]

I feel the stock coils are fine.  Its the wires that become a problem.  If the wires are still working well, I don't see a real need to change the coils if the bike still uses the stock compression ratio.

The Dyna S does draw more power from the bike than the stock points, whatever coil you choose.  It's dwell setting is far greater than points.  There is a previous post about just how much.

If your battery and charging system are up to the increased loads, then it's not really an issue.

Cheers,