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Found this. https://cdn.shopify.com/s/files/1/1091/5694/files/diode-testing-guide.pdf?235929069374954073

BTW , what is the diode test ?

I really was there, I swear! MUTTON is delicious.

The problems have been fixed! -I replaced the oil pressure switch. -I did a diode test on the regulator - which interestingly had not been suggested in this thread - and the test results indicated that one of the diodes was blown, or was otherwise not working. Discussed the test with Electrosport, and they asked me to send in the unit for further testing. -Rather than wait for the Electrosport people, I bought a new Ducati Energia (OEM) regulator from MG Cycle and installed it yesterday. -Fired up the bike a few hours ago. Oil and battery lamp come on with key on. At idle the battery terminal test at 14vdc +/-, and increase when revved. Went for a 100 mile ride: South St. Vrain Cyn - Peak to Peak Highway - Coal Creek Cyn - Home. Had a blast! Foliage, not much traffic, no battery light at 3-4000rpm, and the bike just roared along. Thanks to everybody on this thread who offered thoughtful troubleshooting suggestions. I really appreciate all of the time and effort many of you have put in trying to help me out. Cheers, Sam

. But, wait ... there's more! As I was culling those countless pix, I ran across a few of our cameo appearance at the Kentucky Guzzi rally near Frankfort. Saw this fine fellow, @Chuck! Bill

Will do, ordered new rectifier today Cheers Dell

I got back Tuesday from the 2025 Fall “Mutton Run.” As usual, I’ll post a “too many pix” ride report when I finish culling and captioning the “even more than those” photos. In the meantime, I’ll note that we did have Spine Raider Goofman join us at the picnic. Regrettably, my phone cam decided to give up on focusing for a few days, so you’ll have to trust me that it was, indeed, the Rickster -- @Goofman -- from Celina, Tenn. After the picnic, we visited some of my relatives at the cemetery, did a local ride in and around Daviess and Ohio Counties, then thanked Rick for visiting before watching him head home. Bill

Perfect October weather here in the Sierras.

when you install the new one , verify all connections are SNUG and you do have a perfect ground (earth) connection.

Hi yes, A bit far away from your self Cheers Dell

Sorry , i didn't look at your location.

That makes sense, the original ducati one is still available however it's over £200, I have looked on the Internet and they are selling from £25 upwards so my first thought would they be any good, its a 23 year old bike , so as you say over the years aftermarket parts would have become more available. Thanks for taking the time for your response, Dell

You find now with older machinery that is now supported by the aftermarket because the OEM is no longer available that you can't judge the quality by the retail price. A $200 dollar part you buy in your home country or the western market is still the same $20 item that is made in China for example. The often massive price difference is simply down to retail margins and sales volumes. The ignition pickup is an example. When I went looking for them for the Daytona engine 5 or 6 years ago the commonly available aftermarket ones varied in retail price enormously but were all the same Chinese manufacture. The difference between the direct cost from China and what the retailers were selling them for was massive. So from memory the aftermarket wanted 80 or 90 dollars for them and I bought direct from the Chinese manufacturer for $10 each. I bought 2 and the Chinese one fitted not only looked identical to the OEM original but has worked fine ever since. Things change. Why pay a hefty mark up for the same item from the same manufacturer.

I'm in South Jersey near Philly.

Anyone around in these parts? I'm in Sussex County, NJ.

Cheers Pete, the original one is over £200, obviously I don't want to pay that amount, on the other hand I don't want to buy a cheap one and have problems with it. Dell

The reg/recs are a very common fitment. You should be able to pick one up for £40 or less.

I'll check it out Cheers Dell

Have you tried Gutsibits in Huddersfield? https://www.gutsibits.co.uk/

Cheers, I live in Wales in the UK, I should be able to source one a bit closer to home, thanks for replying, much appreciated Dell

IDK if any other vendors sell one or not . Euro Motoelectrics in Denver sells electrical parts but IDK what brand they sell. I haven't had to buy one and IDK what is the best source.

Thanks, Not quite yet, I need to buy a new rectifier, need to know has anyone used a differnt one from the ducati one. Cheers Dell

good. I am glad you got it running !

Found out the problem, rectifier was fried, its a ducati one, energia 343637, as these are expensive has anyone used a cheaper one that works well cheers Dell