douglasthecook

If you're tight for space, Hayabusa coils are shorter than the GSX-R coils by about an inch/2.5CM...

kgsmotorcycles...where did you go??? Hopefully by next week I'll have the proper length coils on order, as well as the wiring kit to make new connectors. Any updates on your bike?

It felt like it had a miss recently, don't remember if it felt that way last year, but that could be attributed to the ECU going bad I suppose. I did look at all the plugs, and they looked fine, not running rich or lean. I'll probably buy another ECU one of these days once I get the wiring for the CoPs, and give it a shot...I just need to get a second ECU first, as I don't want to fry the one that I just bought...

Unfortunately, we don't really have any place on abse that has the necessary equipment to do this type of testing. Would it also be possible to install some type of in-line resistor or diode prior to the CoP? Plus my ECU already died once, don't know why though, perhaps the issues experienced on the way to and from Mugello contributed??? This is one reason why I'd like to change coils, to ensure that doesn't happen again...

Ok, after doing some thinking on the issue of the ECU/TCI/CDI boxes after mine decided to stop working...from what I was able to gather in troubleshooting my VFR, it looks like the ECU just makes sure the parameters are correct for firing the plugs, and sending the signal to the coil. It ensures that the bike is in neutral with the kickstand down, or kickstand up, and in first gear before it tells the coils to fire. I didn't take a voltage reading from the output side of the ECU, as I wanted to remove the donor ECU so it didn't get fried as well. To me, it looks like the ECU is more of a go-no go/input-output device, than a voltage regulator for the coils. I'm going to get an ECU or two, and some coils from eBay, and see what happens here shortly, now that I've confirmed that my ECU did die. Wit hall that being said, please correct me if I'm incorrect, as I really don't see how the ECU is a player in all of this, other than ensuring that the parameters are correct to send a signal to the coils to fire. The Pulse Generator tells the ECU what plug to fire, the ECU checks to make sure that it's ok to fire the plug and send the appropriate signal, but this is just my guess after doing alot of troubleshooting on my VFR...

No worries. After I get my bike running again, I already figured out how i'm going to wire them up, I just need to do a little more research on what coils I want to use, as it looks like length is an issue that I hadn't accounted for.

Nope, frying is bad, I prefer a nice saute or braise!!! Thanks for the help, I'll let you know when I get it, and what the outcome is.

Did you ever get a response from Accel or Dynatek, Dynojet and Bazzaz? I'm still wanting to do this mod, but have to replace my ECU, as it died at Spa last Monday, and that's my priority right now...While troubleshooting to find the culprit of my no-spark issue, we discovered that the pulse generator was only sending .8v to the ECU. Since my ECU is dead, I wasn't able to find out what the output voltage was supposed to be.

If this is in fact the case, shouldn't this mean this mod is possible on the VFR, and should be fairly easy???

I do not have a spare ignition module unfortunately. I have a fair amount of spare parts laying around, but never the ones that I want to mod. I'm also looking for the front sprocket cover to cut to pieces, but I don't have one of those either...

As long as I get clear instructions on how to wire it up, I'll give it a go!!!

How did you wire these up, do you have a pic or a diagram for us electrically uninclined? Thanks!

The used part is good, as I'm failry sure they'd be rather spendy new. Why does it have to be so difficult to convert old stuff to new? I really thought that this would be a fairly simple mod, but it is proving to be more difficult than I originally thought, heck wiring in the CBR 1000RR gauges wasn't that difficult, just had to match wires, that's all. This is definitely more complex, at least for me anyway!

Ok if the RC-51 and Superhawk (vtr1000 and the rvt1000) run CDI boxes, does that change anything for us, or is it different because we need two coils)?

After looking at the below thread, one of the guys installed these in his '94 CBR 900RR. I doubt those bikes have a TCI box, so we'll see if I get a response to the question that I posted up there... http://cbrforum.com/forum/cbr-600f3-17/coil-plug-conversion-110182/

This helps, thanks for the explanation!!!

Is there a way that these can be home built, perhaps combining them into one unit, instead of running a dual unit set-up?

Back to square one then, the RC crowd has already proved this works on their bikes. 1 coil per plug on those bikes, swapped to 1 cop per plug. And they're using the 2 wire cops as well, so there has gotta be some similarities...

I may be able to accommodate... I could take my F4i harness and coils and modify them so that you can plug them in on your bike and test them. If you don't explode and die, and nothing fails on your bike, then you can replace my parts. Since we're starting with 4 coils and using 4 cops, we could just plug them in directly like the oem stuff. Changing from that is the part of this mod that I don't fully understand and as such am hesitant about. That's what I was thinking, but I don't know too much about this stuff either to be completely honest. I know the RC-51's are fuel injected, and our 750's are carb'd, but I have no idea on if their ECU is CDI or TCI, I'm not even sure what CDI and TCI mean...There's gotta be a way to make this work, as many people on here have done much more complicated mods!!! Weight savings would be nice, but I just want a less complicated wire harness, and to avoid the issue that popped up on the way to and from Mugello that had to do with a coil that wasn't properly re-installed, was too close to my exahsut, overheated, built up too much resistance, and stopped working, thereby shutting the bike down!!!

Ok, if someone can tell me how to wire this up in plain english, I'll buy the coils and wiring harness, and be the guinea pig. I just need to know how to make the changes...

You guys made my brain hurt, which is pretty impressive considering that the brain supposedly has no pain sensors!!!