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Old August 25th, 2017, 12:04 PM   #1
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Joined: Feb 2014
From: TN
Posts: 257

Installing Aprilia(Eldor) coil packs

Thanks to our member cubizme in Vietnam, we may have the answer to keep from frying our ECU, dash, and black box. Do not attempt to pull the black rubber portion that goes over the spark plug ceramic from the Aprilia coil packs! They are bonded on pretty good, and don't have a sufficient barb to hold it on once you slip it over our smooth spark plugs.

I chose to change mine out as a preventative measure. There are plenty out there that haven't or may never suffer from this issue. I sourced my coil packs from ebay using the numbers below.

I had a heck of a time tracking down the stock connector end, but I found it. The stock connector is Bosch 1928404227A linky. I didn't order any, but opted to retrofit the stock connector to the Aprilia coil pack leads without adding any wire. I ordered my 20-17 AWG pins from Corsa Tecnic linky.

Click the pics for full size.

Here is how I went about doing mine. I ordered some Aprilia coil packs P/N: 857084, 857501.

I removed the gas tank, and got to work. Tips for pulling tank.

Remove both coil packs. The connector for the horizontal is connected to a metal tab on the frame. You can see the bare tab form the frame here.

The vertical is zip tied to a plastic piece by the subframe.

The connectors for the coils are quite different. They do share the same color and numbering, though.

First I removed the red protector from the Eldor coil connector, then used a small flat jewelers screwdriver to release the lock, and push the pins out.

Then I carefully pulled the yellow seals back, and snipped the wires at the end of the pins.

Those pins that I just cut off are now the perfect tool for removing the pins from the stock connector. Insert one on both slots by the pin you wish to remove, and push the pin out.

Time to strip the wires on the Eldor coil packs, and put the Tyco junior power timer(JPT) style pins on. I used crimp #4 for the wire, and #1 for the seal.

Line up the pins together for insertion. Yellow(1), Black(2), Red(3).

The yellow seals are a bit tight. I had to pull them through from the front of the connector.

The short lead won't work on the Vertical cylinder. The long lead is good here.

While you're in here it may be a good chance to change spark plugs or your air filter. I placed a small dab of dielectric grease to the end of each coil pack and installed.

I added a zip tie to the female side of the lead as it isn't quite long enough to reach the stock location.

Horizontal coil lead safe, and nestled into its new home.

I hope this helps anyone looking to do something similar. If there are any gaping holes or you think i forgot something, let me know.

Last edited by dragoontwo; August 31st, 2017 at 05:56 AM. Reason: Clarification
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Old August 30th, 2017, 11:42 PM   #2
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Joined: Jul 2014
From: California
Posts: 995

Excellent work - thanks for the DIY. Pending some test results this looks like a worthwhile measure for those planning to keep the Hyper long-term.
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Old August 31st, 2017, 01:28 AM   #3
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Posts: 606

I Ride: Triumph Thruxton R.Ducati 916 foggy rep, NC30 Honda, RD350 YPVS F1, Ducati HyperStrada
Surely if the recall for the dash has been carried out on a bike, which is FOC then this shouldn't be necessary, good to know for future if a coil pack is required and these are cheaper than ducati part No.
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Old August 31st, 2017, 05:55 AM   #4
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From: TN
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Originally Posted by mentalist View Post
Surely if the recall for the dash has been carried out on a bike, which is FOC then this shouldn't be necessary, good to know for future if a coil pack is required and these are cheaper than ducati part No.
Our member cubizme has been struggling with fried dash boards and ECUs lately even though I believe he installed the CAN filter after the service bulletin was released. Afterwards it would appear that while the dashboard was protected, but the stray voltage that the dashboard was soaking up went to the next unprotected part which apparently was the ECU.

His work here which led to my coil replacement.

I don't have all the details of his troubleshooting, maybe he'll chime in with some more details.

I'm not very confident that Ducati will issue a service bulletin for this, as there may not have been enough failures for them to either contract out another coil pack assembly, or engineer a comprehensive fix for the whole bike.

All I know is that there is one of our members that was having repeated component failures, and he may have tracked down the issue that has killed some members bikes here and who knows how many others that don't post about it. If all I need to do is replace 2 coil packs and not have to worry about this failure to keep the bike long term, then its one major failure less to worry about.

I also didn't want to come out and say it right away as I wanted to wait to see what other members thought, but the bike feels a lot more powerful on the whole. I have been riding around in high power with traction control off, and I was pretty comfortable with the performance. Riding around in medium power now feels like high power used to. It was a little noticeable when I had only replaced the front coil without replacing the spark plug. I don't think the new plugs contributed much to the performance, but I believe that the coils did. Even the low power mode doesn't feel as slow and boring as it used to.

The only engine related modification I have done is installing the rapid bike module a while ago. I still have the stock exhaust and air filter.
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Old September 12th, 2017, 04:29 PM   #5
Joined: Oct 2016
From: Vietnam
Posts: 34

Very nice post, bro. Because I am not good English so I can not write a good language for all of you understand. My bike was dead 2 dashboard, then I installed "CAN filter" and I dead 1 ECU. I very angry with Ducati dealers, but they are ignore me.

I had researched the problems in 6 months, I found the main reasons is BERU coils after time used ( 1 month, 2 months, 6 months or maybe 1 year...) will error and fry the dash (without can filter), and fry the ECU ( with can filter). So the Can filter just only protects the dashboard from TVS/EMI, then the TVS/EMI will go back to kill the ECU . Because the Dashboard and ECU are ends of CANbus system . The Eldor coils used to used on Ducati bike and very good working ( Ducati 1098, street fighter 848,1098 2008-2010).

The interesting information is the Ducati Desmosedici Stradale V4 will use Eldor coils again

Finally, I hope all of you Hyper feel safety about your Hyper
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