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Old February 28th, 2019, 04:21 PM   #11
Joined: Feb 2018
From: Scottsdale AZ
Posts: 97

I Ride: Hypermotard 821 SP, and others

Hello Everyone,

This is a quick update on my hyper; I decided to give the dealer that's very close to me a try since I haven't worked with them (Acemotorsports, for those in the east bay area, my first experience with them was very good). The service manager looked up my vin and found 4 open campaigns, which were throttle assembly, top head bearing dust cover, dash resistor circuit installation and insulation of wires for the christmas lights dash issues and finally update the ecu to the latest software.

The throttle assembly's gray plug did have the part number ending in "C," so it was replaced with one ending in "E." The head bearing dust cover is pretty self explanatory. The dash christmas lights issue has been a bit confusing for me as my research doens't match up with Ducati's explanation, which blames the issue on the magnetic field that exists where the voltage is able to jump and take out the dash (and possibly the ecu) and sometimes both.

I will still replace both coils as the only logical explanation for the voltage spike is from a primary source that passes the secondary high voltage in the first place through induction. As it has been noted here and on other forums, the ecu could still be affected by a defective coil since it sits at the end of the canbus chain.

As for the software update, I noticed it had affected the throttle response; it seemed a bit more twitchy down low, but race mode is improved to a usable degree. I tested the new software with my heated grips just to make sure I wasn't feeling the difference between a new throttle spring in the new assembly, and it still felt a bit more twitchy in the low rpm region compared to before pre-software update. I noticed the same issue on my 16 hyperstrada after the sotfware update, but ymmv.

One thing I wanted to note is the improvement in clutch operation. After changing the oil and lubing the clutch cable, the grabby feeling has been drastically reduced, almost eliminated if I'm not paying attention to it. I actually noticed it right after the oil change first, then more so after the clutch cable lube. I will not mention the oil brand here as I don't know if it will work for everyone, but if you like, pm me and I'll let you know.
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Old June 7th, 2019, 01:48 PM   #12
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Joined: May 2017
From: Philadelphia USA
Posts: 311

I Ride: 2013 Hyperstrada, 2007 LS650
I’m very curious to find out if the problem with my bike is related to this coil issue. Two key points Mentioned by the mechanic was the coils were being replaced and every scrap of electronics in the bike was fried.
I’m curious as to the physics of this particular failure. Ignition coils make huge amounts of RF hash that can interfere with sensitive electronics at a distance without any electrical connection. In the 1950s auto makers started using “resistance wires” for spark plugs so a car driving down the street wouldn’t interfere with televisions in nearby homes.
I witnessed this effect with my high school state science fair project. It used the high voltage transformer from a bug zapper to create a spark gap. When a small fan was turned on to blow water vapors from a wet sponge through the gap the arc would change from a single arc to one with many random branches much like lightning. The project was an explanation of why lightning forks.
The project next to mine was a students computer project on an old Mac II. Every time I turned my project on his computer screen filled up with random gibberish and froze. Plugging the computer into another outlet didn’t help at all.

So my point is if you have sensitive electronics in close proximity to high voltage arc discharges then why isn’t every possible precaution taken to protect those electronics from the noise?

I mean Ducati is an electronics company. In addition to being a motorcycle company. So how the heck do they mess this up? I’m not comprehending.

Last edited by philthymike; June 7th, 2019 at 01:53 PM.
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Old June 7th, 2019, 02:14 PM   #13
Joined: Feb 2018
From: Scottsdale AZ
Posts: 97

I Ride: Hypermotard 821 SP, and others
That is correct Mike; from what I recall when first looking into this issue, it's possible the coil(s) develop a short internally, possibility caused by moisture on the horizontal cylinder, that releases the high voltage to nearby wires. I could not obtain agreement on that specific cause from the mechanic I spoke with, but I guess Ducati's side of the story is that by shielding the nearby wires, the stray field could be isolated. Ducati assumes the field always exists under normal operating conditions (actually according to the mechanic), and sometimes more voltage "leaks out," and by shielding and adding a resistor to protect the dash, ample protection from the normal field will be achieved.

I have a hard time buying that story line, but then I have no physical proof either way, only what I have learned, and what you have eluded to, that if a high voltage short could create that type of stray field, no amount of shielding could eliminate it. So again, we are left to wonder about the source, which only supports bad coil(s) or erosion inside the coil, well, that still makes it a bad coil.
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Old June 7th, 2019, 02:17 PM   #14
Joined: Feb 2018
From: Scottsdale AZ
Posts: 97

I Ride: Hypermotard 821 SP, and others
One other item is to cross-reference the old and new coil part numbers. I will bet it's a new part number, why change expensive production costs just to put a "B" at the end of a part number.
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Old June 8th, 2019, 07:21 AM   #15
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Joined: Jun 2014
From: Boston
Posts: 943

I Ride: hyperstrada 821
I think there were occasional voltage spikes and the service bulletin recall is a filter that guided them to ground. Probably some sort of zener diode thing.
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