Help! Just fitted EBR oiljet rotor after second stator rewind and bike ran ok for a couple of miles, then engine management light came on, accompanied by CRK POS message and engine misfire. (The battery was disconnected for a few months whilst I mustered the enthusiasm to carry out the repairs.) Is it possible that the overheating stator caused damage to the sensor during the last breakdown? I've removed the sensor and with ignition on activated the injectors and spark plugs by passing ferrous metal over the sensor tip. Not the perfect test, I know, but an indication that it's working when cold at least. I'm hoping that a new sensor and possible ECM reset will solve the problem but would be really grateful for any advice/experiences from other long suffering 1125 owners.

A slim possibility but is it possible that you've exchanged your rotor for one that had the segments for the sensor badly machined?
I believe there was a problem with a small number of bikes because of this.

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

OK oiljet rotor? what the feck is that all about, or do I have to look up BadWeb, etc.
2008 Buell 1125R, goes like scheisse aus einr schaufel, no fecking about with maps, codes or other bull. Change the oil now and again and ride the thing as it was supposed to be ridden. Racers took stock 1125R's on the track in the US and Europe and won.

2008 doesn't need the oiljet mod as the lower output stator runs cool enough ............. ok there is no longterm proof so far that the oiljet will totally cure the problem but i'm betting that it will go a long way towards it.
Mine was installed with a new stator but Jon at BB thinks the one i was sold as a new genuine by Lincoln HD looked more like a rewound one than genuine, if it is rewound i hope it was done well (it did look as neat as my old original).

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

kevmean, I have recently heard about the aforementioned badly machined rotor but you would have thought that the guys at EBR check them before passing them fit for rework.........wouldn't you? I wouldn't put it beyond the realms of possibility though, given the luck i've had with this issue recently For those "lucky" enough to have an 08 model, you have a different rotor/stator assembly. The "improved" version overheats and burns out the stator. EBR have introduced an oilway in the rotor that sprays the stator in an attempt to cool it. (Something that maybe Rotax should have done in the first place, or by warranty recall programme?) All EBR race bikes are running this type of rotor and they assure me there have been no failures to date. Time will tell. I have a contact email at EBR so will ask then about the machining on the rotor they sent me. Cheers kev.

Any ideas how to stop these rotors cooking... OK I should have said reduce the probabilty??

I have 2009 MY and dont fancy the hassle of upgrading to the oiljet rotor even though this type of failure seems to have caused resale values to fall through the floor......
How about:
only ride if temp below zero
never use full beam or heated mits
Will this make a difference?

just a thought

david

The amount of electrical power that you use has no affect on the output from the stator due to it using a shunt regulator (nearly all bikes use these), so basically the stator output is purely governed by engine revs and any excess power generated is shorted to ground.
Reducing revs is more likely to burn out the stator due to less oil being flung around near the windings, hence why the relay mod drops a phase out at lower revs not higher.

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

Al you could check the rotor segments by looking thru the crank position sensor hole,just rotate the motor by hand and check they have been done correctly. Should look exactly as though 2 teeth have been machined off.
Make sure you didn't disconnect anything else when you were getting the stator wires out of the trunking.Not a lot of room in there.
Only other thought is...did you get the rotor nut tight? the rotors aren't a very good fit,far too loose.

Can't really blame rotax as they didn't supply/design the altenator and probably didn't make the rotor either- if they did then it would fit properly.

Suzukis used to burn stators if oil level was too low,unfortunately the 1125 is dry sumped so no bath of oil for cooling.

I have spare 08 and 09 set ups complete

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Nige...1125d 9.43@140mph

Bit naive of us all to say that Rotax are not responsible? Perhaps that's why they've been able to distance themselves from any possibility of the chance of "out of warranty" claims? They make the engine and ancilliary equipment. They make aero engines. If this were an aero engine, imagine the implications of such a failure at 2000 ft. Just a thought , guys. Maybe this is one of the reasons Aprillia rejected the Helicon V twin in favour of the V4? Still optimistic i'll get to the bottom of the fault and be back on one the the most satisfying TO RIDE motorcycles on the planet soon. (WHY IS LOVE SOOOO BLIND?) I'm sure all the bitterness will subside the next time I fly past a Kawahonducasaki, on the inside of a fast tight right hander.........................PLEASE.

An 1125 crank assembly consists of a one piece crank,to which cam sprockets and gears are added.On the left side of the motor,those gears fit on the same splines as the alt rotor and do not wobble about,they need a puller to remove.
Yet the rotor will just fall off and now requires 300ftlb to keep it in place.

Said crank is also drilled for an oil jet,but strangely the rotor isn't.

That crank and rotor weren't made by the same people.

The aprilia rotax just used a good old fashioned taper to hold the rotor on and had no issues with charging or rotors dropping off.

I've also noticed that from pictures it looks like EBR have drilled the oiljet at the opposite end of the splines from the crank drilling.

The sensible fix would seem to be a 2008 set up,If anyone needs a fix,you price up a rewind and a drilled rotor and I'll sell you a complete 2008 stator/rotor combo for the same price.

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Nige...1125d 9.43@140mph

I think that if you do a google search then you will find that the rotax aprilias also suffered charging issues.

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

The drilling is a counterbored hole at an angle through the rotor hub .

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

strange??? the couple of my mates who ride em haven't had any issues???
No burnt out stators either...and they are dry sumped like the helicon.

Wonder how many they built/sold compared to 1125s??

Kev,got a pic? or can you give a better description? If it's angled towards the oil hole in the crank how's it going to spray onto the stator? or does it flood the rotor?

I'll stick with 2008 parts and loctite on the rotor splines.

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Nige...1125d 9.43@140mph

Al Rowe

There is a hugh section on bad weather bikers well worth a look