Dyna s ignition install

[Guest]

I have a 1981 gs 450t. My trigger ignitor box has gone bad so im thinking about a dyna s d3-3c which is listed for gs400 but i heard it will work right? I am just wondering what type of work/ modifing is necessary to putting this ignition on this bike. Can someone run me thru the install process, i saw another thread on this but it wasnt explained very straight forward. If i am correct, after installing this ignition theres no need for the trigger box, it is just from the timeing plate to the coils correct? Is there alot of modifing that needs to be done? Or do things just plug right in?

[Steve]

I have not done one on a twin, but have done a few fours.

Remove the points and condensors.
Install the Dyna trigger plate.
The two wires from the coils will connect to the Dyna.
You will need to run a power wire and possibly a ground to the Dyna module.
Use a timing light to set the timing.
Reassemble.
Ride.

.

[Rijko]

not a twin, but good explanation

[Chuck78]

Yes. direct swap. Must do a coil relay mod and have a good charging system (i.e sh775 4012941 regulator rectifier and good tested OEM stator) to have the best reliability on a Dyna. low voltage through all of the kill switch ignition switch dozen connections and 7 feet of wire can kill a Dyna even if your charging system is giving the battery good voltage.

Also, the earlier GS500 ignitor/pulse generator/ignition coils are nearly a DIRECT swap onto all GS450's and I believe 400/425 as well. these run better and more efficiently at idle than a Dyna, but the Dyna is easier to source and is brand new for a fair price. the later GS500 stuff I am not sure of but should likely swap as the GS450 and GS500 cranks are all identical except for some minor changes to the last year 2010 GS500 crank. wiring is slightly more involved with the used 500 stuff but not too bad if you are well versed in electrical.
Consult David "drey6" on here for more details on the 500 to 450 swap parts and wiring it in.

[Chuck78]

DO NOT use the crappy slice-n-splice clamp on add-a-wire connector provided in the Dyna S kit. they are trash. FYI. heat shrink tubing, solder splices, tape up, run though Bosch automotive relay with power straight from battery and an inline fuseholder. Novita RS40 or RS45 relay and pigtail if I recall correctly is what I use from autozone. and their heat shrink tubing bulk assortment.

[fast eddie 52]

Leave stock or Dyna S or 2000??? Input appreciated...

[Chuck78]

It would be really helpful if we knew what kind of bike you had. Try going into your account settings from the profile tab, I believe the settings or edit profile is on the left side, then add your bike to your signature file so everyone knows what you are talking about.

[fast eddie 52]

I have 82 & 83 GS1100e...well, the 82 is my son's, but they both stay in my shop...
I don't see a place in profile for bike model...

[OldVet66]

Write it in the signature line.

[Chuck78]

It really depends on what you are doing with it. I don't trust 35 year-old electronics so much these days...
If you were talking about it first generation GS, I usually go ignition relay mod and Dyna-S for ease of maintenance vs points.

If this is a bike that you really wind out, and you need to squeeze the most power out of it and have a rev limiter, definitely Dyna 2000. If it's just something you ride every once in awhile, and it has low miles and has been stored indoors, the stock will probably last a long time