Aprilia Coils ?

boredus · Sep 20, 2021

While reading up to troubleshoot the poor running issues my 2016 939 Strada developed, I found a couple of threads about replacing the Ducati coils for Aprilia ones on the 2014 821 onwards.
Will this still be an issue with the later 939 bikes or would I just be wasting my time/money getting the eldor coils?

Installing Aprilia (Eldor) Coil Packs on Hypermotard/Hyperstrada

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...

hyperstrada.com

cheers
Ian

Araitim · Sep 21, 2021

If I had a warranty on a 939 I would not do the swap till the warranty ran out. I read somewhere that the part number changed on the 939 coils. They were the same brand and part number but a revised coil and the old ones were put to rest. I'm not sure if it's true but if it were my bike and I was out of warranty I would swap. But that just my opinion

boredus · Sep 22, 2021

That's sort of my thought process as well. The bike only came with a 3 month warranty from Ducati and that expired in July.
I ordered a set of used ones off a 2018 Aprilia.
I'll do these when I fit the replacement o2 sensors. I bought new plugs as well just in case. I don't want to have to keep going back in there for this stuff. Taking the tank off is a right pain on the arse.

Mr Duc · Oct 24, 2021

I did this to my 821 years ago due to the OEM ones frying the ECU, and I still have 2 leftover Aprilia coils (since they usually come off a V4) if anyone needs them.

Super easy to splice and I've never had an issue since in the last 10k miles.

Might as well fit a new air filter while you are in there... Such a pain why do we need gas tanks in the way

N4teTheGreat · Oct 25, 2021

25k on my 939 with no issues, I suspect the electrical problems were sorted out.

Tejas · Oct 28, 2021

N4tethegreat, which year 939? I need to hear some positive experiences before I pull the trigger on a 2016 with 11k miles....

N4teTheGreat · Oct 28, 2021

Mine is a 2018. And by no issues I mean none of the issues with frying the dash or ECU. Bike did suffer from some stumbling and surging under maintenance throttle, more noticeable around 3 - 5k. I have since given it a tune with the T800 based on the Star.Ace performance airbox cover. That along with going 2 up in the rear sprocket (I know I could have gone 1 down in the front, but I wasn't looking to go that extreme and 2up mimics the 2015 gearing) and it's muc more driveable around town now. It never had a problem ripping canyons even when stock, I just found the lack of smooth power when I was trying to just cruise in town annoying. It has started having issues with MAP sensor errors, which I suspect could be related to dirt getting into the airbox since the sprinter filter I am using is not really meant for off road, and yet, the bike has spent some time on dirt roads. That issue is annoying, but not a show stopper. Worst case I'll try out a more restrictive air filter or go back to the stock airbox lid. Other than that I've had no issues with the bike.

gatdammit · Oct 29, 2021

I had over 20K miles with no coil induced issues. Swapped to Aprilia just because. Didn't affect anything.

Ducamok · Oct 29, 2021

Mr Duc said:
I did this to my 821 years ago due to the OEM ones frying the ECU, and I still have 2 leftover Aprilia coils (since they usually come off a V4) if anyone needs them.

Super easy to splice and I've never had an issue since in the last 10k miles.

Might as well fit a new air filter while you are in there... Such a pain why do we need gas tanks in the way

I'd like to get the coils. How do we work it out? I'm in California.
[email protected]

jerdog53 · Nov 2, 2021

Can someone tell me the part number used when ordering these Aprilia Coils?

nickwst4 · Nov 2, 2021

Jerdog,

I doubt anyone has ordered them new from Aprilia. My guess is they would be mighty expensive. Just search ebay for used coils from a V4 Aprilia Tuono and you'll get a couple of spares too for 100GBP or maybe ?$150.

gatdammit · Nov 3, 2021

Jer, I have the short corded pair left from the full V4 set I bought. You'll have to do some splicing for sure but PM if interested.

jerdog53 · Nov 4, 2021

EricTostes · Sep 15, 2022

Araitim said:
If I had a warranty on a 939 I would not do the swap till the warranty ran out. I read somewhere that the part number changed on the 939 coils. They were the same brand and part number but a revised coil and the old ones were put to rest. I'm not sure if it's true but if it were my bike and I was out of warranty I would swap. But that just my opinion

jerdog53 said:
Can someone tell me the part number used when ordering these Aprilia Coils?

Hello!
I saw the service manual and the parts catalogue, some parts had the code changed, but it is the same. Just a code upgrade.

The P/N of Eldor coils are 857501(long patchcord) and 857084(short patchcord)

Aprilia Coils ?

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