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Stator replace or rewind

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badapple View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote badapple Quote  Post ReplyReply Direct Link To This Post Topic: Stator replace or rewind
    Posted: 16 Jan 2018 at 20:38
Pulled out the stator today after it failed miserably on the tests from griffs vid on the charging system.





The Aprila parts are out of the question. Been recommended west country windings. As anyone replaced with an aftermarket stator thats lasted well?
I started out with nothing and I've still got most of it left
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Spoonz Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jan 2018 at 20:48
Depends why it failed. If it’s bad flywheel magnets it will fail again quite quickly. If your not going the 380w kit route I would deffo not go overboard on the replacement price wise just in case of a repeat.

Ww windings is as good as any. Don’t touch electrex, very poor quality and backup.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote badapple Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jan 2018 at 21:15
It didn't actually fail as such i was getting very low readings on the dash and on a meter from the battery so it was a matter of when rather than if I think. Theres no heat damage to the dreaded brown connectors and the bike was running without any problems but by the look of it i think it needs sorting! The bikes done around 17k on a 55plt so im thinking its just run its course 12 years isn't bad.
I started out with nothing and I've still got most of it left
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Spoonz Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jan 2018 at 21:58
Ap used wc windings until they went the 380w route and as far as I know they were ok.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote badapple Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jan 2018 at 22:04
Cheers spoonz its 135 quid so worth a punt just wondered if there was a decent new option. Ill do some more digging for info before i.bir.the.bullet got more parts needed so i ger it all in one hit.
I started out with nothing and I've still got most of it left
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Post Options Post Options   Thanks (0) Thanks(0)   Quote albrown001 Quote  Post ReplyReply Direct Link To This Post Posted: 28 Jan 2018 at 01:12
I know it’s a bit late for this post but my stator just burnt out. My one is the faulty flywheel. I had it rewound with thicker wire and less turns and I have a compufire. It lasted 8 years but its now gone again. Only sure mod if you have a faulty flywheel is just bite the bullet and get the new corrected flywheel and stator. That’s what I’ve just done.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote badapple Quote  Post ReplyReply Direct Link To This Post Posted: 28 Jan 2018 at 15:44
Originally posted by albrown001 albrown001 wrote:

I know it’s a bit late for this post but my stator just burnt out. My one is the faulty flywheel. I had it rewound with thicker wire and less turns and I have a compufire. It lasted 8 years but its now gone again. Only sure mod if you have a faulty flywheel is just bite the bullet and get the new corrected flywheel and stator. That’s what I’ve just done.


Hi mate and thanks for the input. Im i right in thinking that the stator lasted 8 years After a re wind? If so id be more than happy with half that amount of time for the cost. I cant afford the oem option so I'll be getting a new one ( RM STATOR ) for 95 quid and hope for the best.
Is there a way to test the reg/rect independently?
I started out with nothing and I've still got most of it left
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Post Options Post Options   Thanks (0) Thanks(0)   Quote adeyren Quote  Post ReplyReply Direct Link To This Post Posted: 28 Jan 2018 at 17:51
Had two alternators go on my Blackbird (common problem). Both were Electrosport who took over Electrx hence they are chinese made now. Crap. Had my original Honda one rewound by West Country Windings. So far so good. £127 including return posatage, 5 day turnaround. All three wires soldered together and the other wires wired straight to the battery and not the loom. Just upgraded the rec to the latest Mosfet SH847 from Roadstercycle.com. http://roadstercycle.com/. Quality piece of kit. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote albrown001 Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jan 2018 at 20:06
Originally posted by badapple badapple wrote:

Originally posted by albrown001 albrown001 wrote:

I know it’s a bit late for this post but my stator just burnt out. My one is the faulty flywheel. I had it rewound with thicker wire and less turns and I have a compufire. It lasted 8 years but its now gone again. Only sure mod if you have a faulty flywheel is just bite the bullet and get the new corrected flywheel and stator. That’s what I’ve just done.


Hi mate and thanks for the input. Im i right in thinking that the stator lasted 8 years After a re wind? If so id be more than happy with half that amount of time for the cost. I cant afford the oem option so I'll be getting a new one ( RM STATOR ) for 95 quid and hope for the best.
Is there a way to test the reg/rect independently?

Alright buddy Thumbs Up Yes it wasn't just a simple rewind though. I used thicker wire and I had to work out (all things being equal) the amount of less turns to put on so it only made around 370-400w. But it still burnt out. I also had a Compufire fitted. Which by its design/operation lets the stator run much cooler. The Compufire connects directly to the battery and misses out all the bike wiring. If I hadn't had done all those mods to go with it I don't think it would have have lasted more than a couple of years. If that. 

If you aren't going to do other mods along with your re-winde it will just burn out again from my experience. Its just not worth the effort and the extra heat it causes, even if its not burnt out its still not good for your engine oil and engine because of the extra heat a faulty flywheel/stator produces. Better off just getting it fixed properly. I don't know how long the warranty on the new stator/flywheel is but it will be longer than what you will get on a rewinde. 

Hope that helps
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 426hemi Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jan 2018 at 20:19
Why the he'll cant manufacturers just fit alternators and be done with this sh*t, my gpz1000rx has one for gods sake and that's 1987 never mind the 900r.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote badapple Quote  Post ReplyReply Direct Link To This Post Posted: 30 Jan 2018 at 09:41
Originally posted by albrown001 albrown001 wrote:

Originally posted by badapple badapple wrote:

Originally posted by albrown001 albrown001 wrote:

I know it’s a bit late for this post but my stator just burnt out. My one is the faulty flywheel. I had it rewound with thicker wire and less turns and I have a compufire. It lasted 8 years but its now gone again. Only sure mod if you have a faulty flywheel is just bite the bullet and get the new corrected flywheel and stator. That’s what I’ve just done.


Hi mate and thanks for the input. Im i right in thinking that the stator lasted 8 years After a re wind? If so id be more than happy with half that amount of time for the cost. I cant afford the oem option so I'll be getting a new one ( RM STATOR ) for 95 quid and hope for the best.
Is there a way to test the reg/rect independently?


Alright buddy Thumbs Up Yes it wasn't just a simple rewind though. I used thicker wire and I had to work out (all things being equal) the amount of less turns to put on so it only made around 370-400w. But it still burnt out. I also had a Compufire fitted. Which by its design/operation lets the stator run much cooler. The Compufire connects directly to the battery and misses out all the bike wiring. If I hadn't had done all those mods to go with it I don't think it would have have lasted more than a couple of years. If that. 

If you aren't going to do other mods along with your re-winde it will just burn out again from my experience. Its just not worth the effort and the extra heat it causes, even if its not burnt out its still not good for your engine oil and engine because of the extra heat a faulty flywheel/stator produces. Better off just getting it fixed properly. I don't know how long the warranty on the new stator/flywheel is but it will be longer than what you will get on a rewinde. 

Hope that helps






Cheers Andrew. This is the thing, i don't know if it is faulty could just be age/wear and tear these bikes are cracking on now and its a huge amount of cash half what i paid for the bike so for now I'll go for a rewind and see how it goes.
I started out with nothing and I've still got most of it left
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Post Options Post Options   Thanks (0) Thanks(0)   Quote badapple Quote  Post ReplyReply Direct Link To This Post Posted: 30 Jan 2018 at 09:42
Originally posted by 426hemi 426hemi wrote:

Why the he'll cant manufacturers just fit alternators and be done with this sh*t, my gpz1000rx has one for gods sake and that's 1987 never mind the 900r.


AGREED!!!!!!
I started out with nothing and I've still got most of it left
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Post Options Post Options   Thanks (0) Thanks(0)   Quote albrown001 Quote  Post ReplyReply Direct Link To This Post Posted: 21 Mar 2018 at 23:13
To be fair my old stator was still charging. I just had a slight leak to earth that was screwing up the bike from running correctly.

In regards to Aprilia knowing about the fault which was too stronger magnets on the flywheel. They did know about it by the 6 month point. They just didn’t tell anyone and Denzo who made the faulty flywheel were supplying Aprilia them for free. Aprilia were making money out of them. Since the gen2 wasn’t made for that long there wasn’t a recall.

Any road, it’s Italian. If you want reliability we’d all be on BMWs 😁

I love my Mille ✊ It’s really good looking but hard to get on with... 🙂
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Spoonz Quote  Post ReplyReply Direct Link To This Post Posted: 21 Mar 2018 at 23:28
Denso supplied the same stator and flywheel to Honda who had the same problem on the 954 blade. They didn’t do a great deal more for owners, just extended the warranty for the stator for an extra year beyond the general warranty of the bike.

From the tests people did the main problem is inconsistent flywheel magnetic field that pulses the stator. If it were purely magnetic strength, they would all fail at similar usage but some are still on the original stator 14 years later. The margin for error was too small to allow for discrepancies or changes. The new flywheel uses identical technology in terms of magnet type, It just has a lower field to reduce output and give a bigger margin before failure.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Af1 Quote  Post ReplyReply Direct Link To This Post Posted: 21 Mar 2018 at 23:53

Gen 2's cure by fire.....

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Post Options Post Options   Thanks (0) Thanks(0)   Quote albrown001 Quote  Post ReplyReply Direct Link To This Post Posted: 22 Mar 2018 at 10:21
That’s what my bike looks like on ‘full bore’ 😉 👍

🏍 Rooaaarrrr
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Post Options Post Options   Thanks (0) Thanks(0)   Quote badapple Quote  Post ReplyReply Direct Link To This Post Posted: 22 Mar 2018 at 10:32
Just got the STATOR back this morning but teesdale parts are pissing me about still waiting on gaskets and a few other bits so i can actually get on with it. Tapmyhead has given me some good info regarding a cooling mod not sure if im going to go down that route yet.

When re fitting the rubber grommet into the casing the parts list note a specific sealant which ive never heard of. Is this necessary or will a blob of hymolar blue do as thats the only sealant ive got in the garsge?
I started out with nothing and I've still got most of it left
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Spoonz Quote  Post ReplyReply Direct Link To This Post Posted: 22 Mar 2018 at 10:43
Originally posted by badapple badapple wrote:

Just got the STATOR back this morning but teesdale parts are pissing me about still waiting on gaskets and a few other bits so i can actually get on with it. Tapmyhead has given me some good info regarding a cooling mod not sure if im going to go down that route yet.

When re fitting the rubber grommet into the casing the parts list note a specific sealant which ive never heard of. Is this necessary or will a blob of hymolar blue do as thats the only sealant ive got in the garsge?
 
I take it you mean the grommet for the stator wires ? That sealant is there just to seal things up as the grommets can weep but it's worth smearing some where the wires pass through and where the insulation stops on the stator wires itself. Oil sometimes tracks up the inside and outside of the insulation and contaminates the wires.
 
I'm guessing the sealant they spec is resistant to higher temps and oil etc etc but I would use something like 3 bond if you have some. Ducati's have almost completely done away with gaskets apart from the cylinders and use 3 bond instead so it's good stuff.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote badapple Quote  Post ReplyReply Direct Link To This Post Posted: 22 Mar 2018 at 10:55
Yes spoonz thats what i ment thanks i don't have any but will get some ordered while I'm waiting on the gasket.
I started out with nothing and I've still got most of it left
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Post Options Post Options   Thanks (0) Thanks(0)   Quote badapple Quote  Post ReplyReply Direct Link To This Post Posted: 23 May 2018 at 21:00
All bolted up time will tell if it holds out but getting healthy readings on the maiden ride heading out for a longer ride tomorrow. Thanks for all the advice Thumbs Up
I started out with nothing and I've still got most of it left
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