Hi folks

I've done 80 mi on my 1125R since purchasing it Thurs this week. Unfortunately, I've been struck by charging issues already with a sys voltage too low on the display. I was well aware of the problems with 1125 models before buying and checked the battery was charging before purchasing - it was showing 13.8v at the battery. 80mi later not looking so good.

Anyhow, I've followed the electrical manual and:
1. Each stator phase to earth = open circuit so all good
2. Phase to phase resistance = ~0.8 ohms so would have thought this was acceptable
3. Phase to phase voltage while running - around 1v, for each combination. Certainly not the 40+v AC it should be.

A little confused. Resistance check implies stator windings ok but no voltage. Does that mean my rotor is screwed? Wouldn't that mean either it's not spinning or magnets have all fallen out? 🤔 No horrible mechanical noises to suggest that though.

A weird thing happened while investigating above. While running on the drive, I had a puff of something, not sure it was smoke under the air box. It carried on running fine but I shut it off quick. It fired back up ok but getting a few wisps of smoke from same area. Doesn't smell electrical but a little disconcerting.

Kinda hoping I could enjoy it for what bit of summer is left before having to get hands dirty. Clutch slave leaking too but ordered an Oberon replacement.

Cheers

smoking sounds fucking bad , electrical fires cause massive damage
get your money back from the vendor asap

...or
start stripping it down to find the source
at a guess as you have a charging issue & smoking cabling suspect its going to the voltage regulator

good luck which ever way you choose

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Feros Ferio

It's not r/r smoking as that was disconnected at the time. Also, no AC voltage getting to it at the moment. Smoke was emanating from the top of rear cylinder. I've started to strip it down, no obvious melted cables as yet.

Anyone have any suggestions re the stator and the readings I've got? Hopefully will get it out the bike for a closer inspection tomorrow.

viewtopic.php?f=8&t=23309&hilit=1125+charging
viewtopic.php?f=8&t=22920&hilit=1125+charging
bit of info for you

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Buell Ulysses XB12X 06/08

Resistance across windings should be 0.1-0.3 max.

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Mithered ta death.
92 MB
96 S2T
98 S1W
00 M2
01 X1
03 P3
10 CR

Yeh I read that in the electrical diag manual. 0.8 isn't much though, not like it's k or M ohms implying a break. It's on the bike lift now, slowly being stripped down. Looks like new stator, Hildstrom rotor mod and source a series r/r are all in order.

Any recommendations for a UK source for a series r/r? I found this on eBay 265204529011.

viewtopic.php?f=17&t=146

give this a read it explains it
good luck

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Feros Ferio

Be very careful when checking resistance on any item to make sure you take into account any resistance of the actual test meter leads you might find if you put the leads together that your meter will read 0.6 just through it's own leads

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2001 X1 2009 1125CR 2006 Uly X3 2010 Uly a fully Maz'd S1 and a 1991 RS1200 Westwind.

Good shout. For some reason I thought my multimeter read 0 ohms through the test leads but it reads 0.5. Given that, seems my stator windings are in spec on the resistance front. Shame I've already taken it out the bike

What I don't understand is why no AC voltage with the engine running. Rotor is all intact and very magnetic. Unless I need to go back to multimeter school

You did of course set your meter to read AC volts didn't you ?

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Mithered ta death.
92 MB
96 S2T
98 S1W
00 M2
01 X1
03 P3
10 CR

Have you identified what has caused the "smoke "
Does sound as if your stator is within spec, so should be ok .
that leaves a Wiring loom fault or R/R failure to cause no AC voltage

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Buell Ulysses XB12X 06/08

Yep, I'm sure I did. For sake of my sanity I might wack it back on and retest.

Short answer is no. Cables down to stator are in good order and there isn't that classic electrical burning smell in the area. It was more like a hose popping off and dumping something on the hot motor. It was quite a hot day when it happened and I could hear the fuel starting to boil in the frame and it was pushing petrol through the vent hose.

I'm gonna put the stator back on and run it to see what happens. I need to sanity check my stator AC readings anyway.

Is there an easy way to identify whether you have the earlier or later rotor/stator set up? I read somewhere 08s were more likely to pop r/r and 09-10s burnt stators. My bike was assembled Dec 08, VIN indicates 09 model and it's on a 2010 reg plate!

The r/r in mine is the Ducati version if that helps identify.

If you have the airbox bottom off check the engine breather, it just slots in about 2 inches from the rear & the little foam filter that's in the end can clog with oil & drip onto the engine. Just take the foam bit out & clean it. It's worth doing anyway even if it isn't that.
Hope you get it sorted.

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Ride Safe & Stay between the hedgerows.

08 will have a blue frame , 09 model will be black frame.

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2001 X1 2009 1125CR 2006 Uly X3 2010 Uly a fully Maz'd S1 and a 1991 RS1200 Westwind.