Replacement Ignition for any GS

[Matchless]

Probably a combination of both Andre... but that would get real complicated real fast!

I'd love a TPS on my carbs too actually so that when I do finally get down that wideband path I have something to work with when data logging the O2 readings.

Pete, it seems that a TPS for a bike is quite expensive and one off a car can be made to work just as well. I have stumbled upon a few methods for fixing one to the carb rack and watching ebay for a specific shape to come up that would make the shaft connection easier....

[pete]

Yeah I was eyeing off some on eBay. There was a particular type for some sort of Honda that were a dime a dozen from China or Hong Kong or something, but I couldn't figure out in my head how I could mount it on the carbs...

If you find something, definitely post it up as I'm keen to see how you do it.

Edit: Just remembered... the later model 500's (2004 onwards maybe?) have swap in carbs for the 450 that have a TPS on them... so if I do go this path I might even keep an eye out for a set of them...

[Matchless]

Pete,
Here is a guide on how you can make it bolt on style:http://www.pattonmachine.com/TBI-TPS-Install.htm

I have also found one where the guy removed the butterfly shaft and turned a longer one on a lathe etc.

I think the first is exactly in your sphere of expertise!

My snap vents have finally arrived! Now just to find a 83mm hole saw.

[pete]

Aaaah nice! That looks similar (if not the same) as the TPS I've seen on Ebay for something like $1.65 out of China or Hong Kong... top notch quality too I'm sure...

But it would definitely make it a cheap experiment!

[Matchless]

Pete,
If you are still watching this. The Dyna-s DS3-2 for the GS550 arrived today. The size of the trigger units area a fraction of the older ones and it can still drive the ignition coil directly!

[Matchless]

I think you did some research on these a while back. Do you have any more info on this change or upgrade?
Here is a picture of the older Dyna-s DS3-2 for comparison:

[pete]

Wow that new one's tiny!!! Do they use the same mounting holes and are just flatter? That's how it looks in those pic's anyway.

I enquired with Dynatek after my initial one's right module carked it, and all the DS3 series use the same modules, so I actually bought a DS3-2 and did the direct swap onto my DS3-3C plate, so I have a spare DS3-2 plate here. Actually it might have been a DS3-1 now that I think about, but would need to go look and see...

Either way the new one I got still has the bigger modules, not those new slimmer ones...

[Captain_Trips]

My bike is missing the points, so any replacement would be cool, but I'm not sure I entirely trust the Czechs.

[Matchless]

My bike is missing the points, so any replacement would be cool, but I'm not sure I entirely trust the Czechs.

The Dyna-s, which allows you to retain your old points coils (they need to have a primary resistance than 3 ohms at least) is a cost affective and and quality upgrade for your GS400. You just need to varify with Dynatek exactly which kit you require.
The Czech TCI is overkill for your bike anyway, unless you want to play with advance curves etc.

[Matchless]

Wow that new one's tiny!!! Do they use the same mounting holes and are just flatter? That's how it looks in those pic's anyway.

Pete,
If you look at them closely there is hardly any space for components, the footprint and screw mounting seems to be the same as the older type. I can only guess that there is only one component inside it that can handle the high current to run the coils and detect the magnetic trigger.

My guess would be the same or higher as the old output transistor in the ignitor which is mostly about 6 Amp?
New technology and most likely more reliable!

[pete]

That's impressive! And I'll bet the high bit is purely a result of needing to keep the rotor a stock replacement item...

[Matchless]

That Dyna-S is a good piece of kit and the support guys at Dynatek are outstanding!

The GS550 is very happy and the owner was smiling from ear to ear!

I put together a summary with some photos for future reference and if anyone is interested they can download it from here:

http://www.mediafire.com/view/?iicnca842t47hnx

If you want me to amend or add anything feel free.

[pete]

+1 to that Andre, they were extremely helpful to me also when trying to figure if the DS3-3C was suitable for the 450's or not.

Nice write up too Andre, I did something similar for the 450's myself.

[mike_of_bbg]

Wow, yeah, those Dyna sensors have gotten quite a bit smaller.

Don't know how relevant this might be for our bikes, but I did find this a little while back - from those crazy Aussies :

http://www.jefferies-au.org/MyECU/MyIgn.html

http://www.jefferies-au.org/MyECU/RecIgnAssembly.html

Particularly, the fact that there is an adjustable built-in advance curve seemed like a good thing for those later-model GSes. I'll leave it up to those more electrically inclined than myself to decide if it would be compatible.

[Matchless]

Nice write up too Andre, I did something similar for the 450's myself.

Pete,
I remember you digging into it at the time. Do you mind pointing me to your write up, I would like to save a copy for my archives, just in case...?

I read something somewhere that these "triggers" can be used to drive a TCI/ECU as well. Not sure which though, most likely the aftermarket programmable types.