• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

Need Help Identifying My Factory Ignition

  • Thread starter Thread starter alkswheetinjur
  • Start date Start date
A

alkswheetinjur

Guest
Looking to replace my Dyna S as it appears to no longer be working. Bike had a Dyna installed when I purchased it and I do not have the factory points in my parts bin. Can't see any stamp marks and I'm not sure if it is/was a Nippon Denso or Kokusan Densi. Also does anyone know the difference in the DS3-1 and DS3-2. Photos below.

PART_1495748858884_IMAG0082.jpg
 
From the description of the two units at Z1 Enterprises the advancer is different for the KD/KOK or ND system requiring the DS3-1 or DS3-2. I have only seen a ND system so I couldn't tell you anything about the advancer identification but I bet Dynatec technical support could tell you. If you have any trouble getting in touch with them I would be glad to call and see if I could find out.
 
Last edited:
Looking to order a replacement today if possible so if anyone has any info I would really appreciate it.
 
like OldVet66 said, Dynatek is really helpful.
I have called them several times and was pleasantly surprised.

They may be able to identify your current Dyna S as being DS3-1 or DS3-2
so you know what to order.

If they confirm Earlfor his statement, you could order either since you have the
correct rotor. Someone offered a cheap Dyna S on here, that could be an option too.
earlfor said:
The only difference between the Dyna "S" DS3-1 and the DS3-2 kit is the rotor.
Click to expand...

Also give the advancer some tlc - i see rust on the pivot where the circlip is,
that may cause stuck levers and bad advance.
A drop of oil and 5 minutes of work may save you grief in the future.


 
Last edited:
I will call Dynatech in about an hour when they open. It's 10:14 here and there is a three hour time difference.
 
Last edited:
In your first post and picture to the left end of the top spring is the manufacture mark. It's a circle. If it has ND it's Nippon Denso. If not its Kocosan Denki.
 
uk gs nut is correct. According to Dynatech the manufacturing mark under the spring post is the only way to tell which advancer you have. They also said the rotor is stamped with a number on the end, 5 for KD and 6 for ND but you might have to remove the end bolt and nut to see it. All rotors are black but heat over time can change the color of the anodized aluminum. My black saddlebags turn purple in the heat of the sun so I guess heat is the cause of that purple rotor.
 
Last edited:
Thank you, oldvet66. I find that's the best way to find out what ignition it is. Could this be made a sticky as it's asked often ?.
 
i think this info would be a great addition to Mr. Poulsen's
Dyna S installation manual hosted on BassCliff's website.

Not sure if that's an option, but since that's our main source of
documented info ... that's what popped into my mind.

I would be happy to do the documenting if needed.
 
Last edited:
hoping to get as much info here as possible, will be saving this
thread into my documentation.

alkswheetinjur, would you be so kind as to make a good closeup picture
of the manufacturing mark ?

OldVet66, did Dynatek confirm the rotor is the only difference between the Dyna DS3-1 and DS3-2 kits ?
 
With a little cleaning and closer examination (sorry my eyes are shot) It looks like I have a Nippon Denso. So I will be ordering a new DS3-2. Thanks for the response. Hopefully this helps someone in the future.
IMAG0091_1.jpg
 
Nippon-Denso or Kokusan

Nippon-Denso or Kokusan

Im trying to order Dyna S for my bike and getting really confused as to which version I need. My 1982 gs550e had electronic ignition but a PO has retro fitted points wit ha plate with the condensors sticking out. It has an advance unit with a mark that is a circle with what looks like a Japanese character in it, not ND. So looking at previous posts and reading experts docs which say if its not ND in the circle, its a Kokusan advance unit (See pic).
However, sent the pics to Dynatek and also their reseller and they are telling me I need the DS3-2 unit which posts here and the reseller say is for Nippon-Denso.

It seems like there is a conflict between what Dynatek say and some of the posts on this site. Can anyone offer explanation or am I being really stupid?
Only thing I can think of is the ND is sometimes in Japanese!
IMG_4006.jpg
Added - having read a bit more it seems like there might be a 3rd type of advance unit on later bikes?
 
Last edited:
info from dynatek - Suzuki used two (2) different ignition manufacturers at one point: KD and ND. The only difference between the two advancer assemblies is the height of the rotor that fits the advancer. The same ignition plate is used in each system. The issue in identifying the two advancers is that they are not always marked with a KD or ND and the 550 engine may have used either kit, depending on the year. At this point, I would say pick one kit, the DS3-1 for the KD or the DS3-2 for the ND and get the new rotor and advancer installed and see if the rotor fits without either binding when the hold down bolt is secured or has an excessive gap between the rotor and 19MM hex head nut.
The difference in the rotors and advancer shaft lengths is nominal and you cannot determine which is which visually and we have no documented advancer shaft lengths for reference.

furthermore there are 3 different part numbers from Suzuki, 2 for pre 79 bikes and then just one for 80 onwards.
1980/1981 33120-47020,
1978 kokusan 33120-4502
1978 ND 33120-45011
 
Last edited:
Dynatek seems helpful.

Is it an option to measure the rotor length you have and ask them to measure their 2 Dynatek rotors ?

If they say "excessive gap" i would think the difference is obvious ?
 
Last edited:
I think Ive now worked out there is a later 3rd advance unit for 1980 onwards, marked with a circle with a squiggle in it. This was the only unit fitted in 1980 onwards according ot the parts manual so it doesnt say whether its ND, KD or something else
On the Dynatek website you can select a 1980 bike and it comes up with DS3-2 version of Dyna so im guessing this will be correct
rotor mark.jpg
 
Last edited:
You must log in or register to reply here.

Similar threads

Chuck78
GS500 electronic ignition into GS400/425?
Replies
9
Views
206
kochic
kochic
CincinnatiKid
81 11e timing with a Dyna S
Replies
6
Views
139
rphillips
R
R
mechanical advance limited range GS550
Replies
2
Views
70
Nessism
Nessism
acr88_
IGNITION TIMING, Stock Signal Generator Installation
Replies
2
Views
87
salty_monk
salty_monk
D
Help needed identifying GS550 model
Replies
8
Views
196
DKGS
D
Back
Top