Stick coils

[wraith]

Not going to highjack someone else thread, was thinking of this then not but now am, going to put some on the Hellcat (gsx1100f, b12 engine project)  

So, will the 98 on ward coils work? 

Has anybody got a wiring diagram as to how to wire them up? 

This is all a bit new stuff for me 

[Oilyspanner]

It's a few years since I converted mine to stick coils, but I seem to remember that the resistance on 98, 99 srad wasn't suitable.  The k1 to k4 R coils work out very close to 3 ohms when linked in series. There's other makes with the correct resistance coils, Triumph daytona 600 and 650, Kawasaki zx6r...but I don't know which years. 

If I fire up my old laptop I'm pretty sure I've got the diagram from practical sportsbikes.....which is what I used to do mine.

[DAZ]

52 minutes ago, Oilyspanner said:

 

If I fire up my old laptop I'm pretty sure I've got the diagram from practical sportsbikes.....which is what I used to do mine.

It would be great if you could, maybe it could become a pinned thread make it easy for anyone interested to do the same 

[Upshotknothole]

I have R6 coils sitting in an engine on the shelf that I was told years ago would work, but keep forgetting to install them on anything.

[wraith]

1 hour ago, Oilyspanner said:

It's a few years since I converted mine to stick coils, but I seem to remember that the resistance on 98, 99 srad wasn't suitable.  The k1 to k4 R coils work out very close to 3 ohms when linked in series. There's other makes with the correct resistance coils, Triumph daytona 600 and 650, Kawasaki zx6r...but I don't know which years. 

If I fire up my old laptop I'm pretty sure I've got the diagram from practical sportsbikes.....which is what I used to do mine.

That would be helpful  I will have a look for some k1-k4 coils 

Anybody used any other years? Just to keep the search open 

As below mite be a good sticky post on this subject what we could add to as to what works and what doesn't ? 

[Oilyspanner]

i forgot how annoying microsoft laptops can be ! Had it as a pdf, but swapped it to a jpeg -hope it comes out okay....

Sorry Wraith, I saved the 1st page the right way up, but when I brought it to the page it was upside down...

 

[Upshotknothole]

1 minute ago, wraith said:

That would be helpful  I will have a look for some k1-k4 coils 

Anybody used any other years? Just to keep the search open 

As below mite be a good sticky post on this subject what we could add to as to what works and what doesn't ? 

I've seen reports on here of some people having weak spark or other running issues after switching to stick coils, which has been part of why I keep procrastinating on doing the swap on any of my bikes. It would be nice to know what works and what doesn't.  I do remember being told R6 coils work, but can't remember what year they were. I think mid to late 2000s.

Those magazine scans are what I remember going by originally as well.

[Oilyspanner]

I tried saving it upside down thinking it might come out correct...but no. So I saved it on it's side, at least it's easier to read !

[Dezza]

This may be clearer: it's the important bit.

[Oilyspanner]

There were a few bikes in the early 2000s that used similar spec stick coils. I've heard that the R6 used a similar spec too. I plumped for the early K series coils as I knew they worked. Converted mine many years back (8 or 9 years)and they've worked very well. My bike's had high compression pistons etc for 5 years and covered 12/13000 miles and the spark seems to coped well with that. Turbo and nitrous probably not though.

[Oilyspanner]

7 minutes ago, Dezza said:

This may be clearer: it's the important bit.

Nice one Dezza 

[DAZ]

12 minutes ago, Oilyspanner said:

There were a few bikes in the early 2000s that used similar spec stick coils. I've heard that the R6 used a similar spec too. I plumped for the early K series coils as I knew they worked. Converted mine many years back (8 or 9 years)and they've worked very well. My bike's had high compression pistons etc for 5 years and covered 12/13000 miles and the spark seems to coped well with that. Turbo and nitrous probably not though.

This is great ,I recall people saying that it wouldn't work and would burn out the ecu but if ,like you you get the right cops it works 

[george 1100]

Zx10 work also but can't remember the year. There was a list of coils on the net somewhere with ohms noted. 

 

 

[Joseph]

Yamaha R1 2007-2008

Kawasaki ZX12R 2000-2004

Kawasaki ZX9R 1998-2003

Suzuki GSXR 600/750/1000 2001-2003

Suzuki Hayabusa 1999-2014

[Joseph]

And that's only a small list, there must be many more

[spiderpig]

Is there any real advantage other than cost? 

[Dezza]

2 hours ago, spiderpig said:

Is there any real advantage other than cost? 

Probably seeing as all motor manufacturers use them now. Secondhand they do work out cheaper than normal coils, leads and caps but one big advantage for non-stock bikes is space saving under the tank. Before using stick coils I have never had a rebuilt bike start first press on the button but that's N = 1 so an anecdote and anecdotes aren't data.

Edited February 24, 2023 by Dezza

[spiderpig]

Interesting  I'm doing a 7/12 that could use some space saving  might save the dynas for the fighter

[Joseph]

On 2/24/2023 at 8:48 AM, spiderpig said:

Is there any real advantage other than cost? 

200g weight gain, massive ballache to access the OE coils removed, and no more spaghetti under the tank

[Gixer1460]

Can't complain about the 200g LOSS in weight but as regards access - Hmmm! If you put the replacements where the factory wants you to put them, then yes I agree - so put them somewhere else! I had mine under the seat with my turbo install - lift seat instant access, just long plug leads. Getting sticks out from a tight under tank is still a PITA.

[Joseph]

You can definitely get all four stick coils off and on the bike without removing the tank, and the job will be done in under 2 minutes on a slingshot, haven't attempted it yet on a slabside. 

Edited February 25, 2023 by Joseph

[Smifee]

Interesting topic, Does anyone know why they are wired in series and not parallel?

[Gixer1460]

59 minutes ago, Smifee said:

Interesting topic, Does anyone know why they are wired in series and not parallel?

Because they have such low resistance ie. usually 1.5 ohm or below, if you use them in series, you add the resistances together so 2x 1.5 ohm = 3 ohm and about equal to a normal twin tower coil, but each stick will be receiving about 6-7v each. If wired in parallel, the sticks will get 12-14v each but circuit resistance is halved, which poses problems for std. ignitors or rather their power transistors. With 3.0 ohm resistance and 12v the transistors are handling about 4amps (12v / 3r = 4a) but changing that to (in parallel) you get 12v / 0.75r = 16a - so 4x the power which will burn them out. A std OEM ignitor is usually max'd out if using 2.2 ohm Dyna coils. This is about the limit of my basic electronics theory understanding so an adult may rectify if i'm wrong LOL!

[Nelson]

I’ve also been thinking about the COP change, supposed to give good spark, don’t get wet & sorts that snake’s wedding under the tank, but where do you get the harness plugs from ?

[Oilyspanner]

Look up Denso coil connectors and they'll come up.#bay normally have them too. If your dual coil system is working well there's no real improvement,  but old ht leads and coils often play up, or the caps get loose etc. The wiring loom is very flexible,  not rigid like ht leads, so nice to route where you want - you free up a chunk of space where the coils were (can put the main loom there) and it's really easy to get the coils and harness out of the way when you want to remove the cam cover.

Starting does seem very good.