Aftermarket Stator Spreadsheet

[Griffin]

So I've got three spare stators on the shelf, one from RM (RM01083), one from Electrosport (ESG014), and one from Electrex (G02). Two of them the larger size, one the smaller. While looking them up to see exactly what they are supposed to fit, I noticed some inconsistencies in what stators are used for which GS bikes between the manufacturers. Being the somewhat OCD person I am in such things, I compiled a spreadsheet of the stator units that each of the four (as far as I'm aware of) manufacturers of aftermarkets stators offers.

The results are below:

I highlighted in identical colors the closest models from each manufacturer, but there are some differences. I think that there are a couple of errors and have highlighted them with notes.

I personally prefer the Electrosport (or Electrex) stators, they seem to have the thickest insulating epoxy layer on them compared to RM and Rick's.

If someone wants the original Excel file, I can email it to them. I can also email a pdf version if one prefers that.

Comments? Observations?

 

[Steve]

I would be interested in adding Caltric to the list. I have used a couple of their stators and have had no problems.

I learned of them when BassCliff mentioned that he had one in his bike.

I had started a similar spreadsheet (but not as extensive) when I was offering rewound stators, but the price of the Caltric stator was a bit cheaper than my rewinds. That happened to co-incide with problems with my supplier so I stopped offering rewinds.

 

[Griffin]

I'll look them up and see what I can find out.

 

[glib]

Thank you. Good to know.

When I searched Electrosport stator for GS1100 (following posplayr's advice) on Ebay, it came up with ESG 021 first and then ESG 020. When I added 1983 to the search it came up with ESG 020 and then 021. All with notes that they will fit GS1100E. I almost bought the ESG 021. Now I see that I need ESG 024.

What is the difference in the models if they will all fit?

 

[Griffin]

Thank you. Good to know.

When I searched Electrosport stator for GS1100 (following posplayr's advice) on Ebay, it came up with ESG 021 first and then ESG 020. When I added 1983 to the search it came up with ESG 020 and then 021. All with notes that they will fit GS1100E. I almost bought the ESG 021. Now I see that I need ESG 024.

What is the difference in the models if they will all fit?

My guess is the wattage output, but the manufacturers are pretty spotty when in it comes to publishing technical data.

 

[Nessism]

It would be interesting to know the power output. Unless someone is running a series R/R I don't think a "high output" stator is desireable.

 

[Gorminrider]

Hmmm.Interesting.... I've only got a 650G and Canadian GSX400's that I find both use the same stator...but your table is a caution, alright.

650G: Since I have a 650G, and GSX400s I'd say it should be "Yellow" across the row or could be.... Rick's and RM differ from me ,Electrex and Electrosport... I'd have to look up what's so special about the models they supply for these versus what they offer for the 450s ( my conviction that they co-relate to my GSX400 in stator)

I'd vote you are correct per the 77-79 550s and 400s .

 

[Griffin]

On the GS1100E, notice that three of the four use the same unit for all years, but Electrosport recommends a different unit between the '80-'81 and the '82-'83 models. I know from old magazine articles that the electrical output was upped for the '82 1100E, so my guess is the ESG024 stator puts out more wattage than the ESG021.

 

[Griffin]

Hmmm.Interesting.... I've only got a 650G and Canadian GSX400's that I find both use the same stator...but your table is a caution, alright.

650G: Since I have a 650G, and GSX400s I'd say it should be "Yellow" across the row or could be.... Rick's and RM differ from me ,Electrex and Electrosport... I'd have to look up what's so special about the models they supply for these versus what they offer for the 450s ( my conviction that they co-relate to my GSX400 in stator)

I'd vote you are correct per the 77-79 550s and 400s .

Now that you mention it, I believe Rick's and RM are in error on their listings for the 650G/GL/M. They list a stator that is the larger size. From your experience and what the other manufacturer's list (smaller size fitting that bike), I'd say that they have the wrong unit listed.

 

[Gorminrider]

It would be interesting to know the power output. Unless someone is running a series R/R I don't think a "high output" stator is desireable.

Good point....Though I would say, "unless someone needs extra power for accessories and has a R/R that "matches" the stator output". Indeed, that may be a series R/R but at least? it could be a new FET shunt type with a higher rating than the OEM.

 

[Guest]

I bought one from Rick's for an 1100L and the pigtail was way to short.

 

[roeme]

Very useful, thanks for compiling this.

Consider pasting into a shared Google Sheets. Makes it easier to copy data, and if desired, multiple persons can edit it.

 

[Steve]

Good point....Though I would say, "unless someone needs extra power for accessories and has a R/R that "matches" the stator output". Indeed, that may be a series R/R but at least? it could be a new FET shunt type with a higher rating than the OEM.

Does not matter how high the rating is, it would still be a SHUNT regulator. It is the "shunt" part that kills the stator.
A series-type R/R will allow all necessary current to pass and will prevent any excess, rather than shunt it.

.

 

[Grimly]

Excellent work, thanks for that.
This confirms what I've seen when concentrating on what fits mine - I already spotted teh GS500 is a legacy fit from the 850 and others, which makes it a cheap source, as it was in production for so long, and the Chinese are still knocking them out for relative peanuts.
Electrosport made that very easy, as did Electrex, but others have deliberately obfuscated types and sizes to prevent x-reffing, as they know damn fine people will look for other sources if they're sure of a fit.
The 1100s often had a larger diameter (but not all) which allowed a greater output, I would assume. From 1000 downwards, the stators all seem to be around the same physical size (dia, centre hole) but differ in thickness, and therefore winding length totals.
In some models, there was a difference in output, but the aftermarket makers who've rationalised the range on offer have decided to trim the fat, as it were, and make more of a one-size-fits-several approach. Which is fine for the normal user who's only going to be running ignition and a headlight. The serious tourer (are there many left on 35 year old bikes?) will be well advised to fit a Series reg and LEDs to counteract the limited output of what might be the only stator he can get.

 

[Allie]

Does not matter how high the rating is, it would still be a SHUNT regulator. It is the "shunt" part that kills the stator.
A series-type R/R will allow all necessary current to pass and will prevent any excess, rather than shunt it.

.

Just remember, you shunt use anything but a series R/R as a replacement.

I did not know you stopped offering rewinds, sad to hear.

 

[Allie]

Someone needs to fire me from the comedy detail... :disgust:

Sooo anyhoo, I just received a Caltric stator (Mr. Steve recommended?) for my bike today, I wish I'd remembered this thread when I was ordering. My memory is... what was I saying?? But yeah they sent me an 18 pole stator. Sure enough I took the case oft and the one inside is a 12 pole.... Well I -do- have a rotor from and 18 pole stator kicking around here. As a side note the stator from Caltric is smaller in width from the 18 pole 850 stator in my parts bin, I don't know if 750 18 pole units are normally smaller or not. I wouldn't be surprised to learn that 850s have beefier units I guess. I will contact Caltric and find out if this was an 'error' (that they acknowledge) or not. I'd prefer to stick with stock specs on general principle unless there's a compelling reason not to. For example I'm replacing the regulator and the rectifier and NOT going with stock specs.

 

[tom203]

Don't fret about the different thickness of stator- I got 3 units all allegedly off 650's and they varied by about .060 inch in thickness. Just make sure you use a SH-775 to skip baking your stator.

 

[Redman]

Brett,

Looks like a worthwhile endeavor (maybe we both have a problem).
Maybe add a column for what you know about 12 pole or 18 pole (12?, 18?), a column for what you know about this ID and that ID.
ANd what is it that is different between 1000/1100 and the 850&under.


I have a new spare DB Electric stator ASU4002 on my shelf (or in side bag on long trip) now this year. (You may say, "Yah, now you do, why did you not last year?")

Anyway, the box says it is for GS1000, GS1100, 700 (but doesnt list years). So seems to fit the pattern I see there on your spreadsheet for the other manufactures.
If you would like to have a column for the DB Electric units, I can volunteer to do that for you (send me spreadsheet). Or maybe you dont care to bother with such a cheap one (was $81 including shipping.)

.
.

 

[Allie]

Have had some contact with a rep at Caltric. He maintains that the stator that was sent to me is the correct one for my bike, and does not appear to understand why I cannot simply put an 18 pole stator in and have it work. The two designs require different magnet configurations to function from what I've read, or did I misunderstand that? If 12 and 18 pole stators are interchangeable I'll just be happily on my way...

 

[Grimly]

No, they're definitely not interchangeable - speaking purely of the 79 / 80 850s, you can physically fit an 18-pole stator to a 12-pole rotor and happily start the bike, but you won't get any electricity out of it. Don't ask me how I know that.
The 18-pole GS850 rotor *might* fit your 750 crank, and it *might* clear the inside of your side case, and it *might* interface with your starter gear, but I stand to be corrected on that. When you say the stator is a different width, do you mean diameter or thickness?
The thicknesses of the 850 stator (and the whole series that uses that diameter 18-poler) vary from 18 to 24mm, iirc. They all have the same I.D and O.D though. I'm not certain about the fixing holes position - every one I've seen has the holes in the same position, but that doesn't mean zip.
As I mentioned above, the GS500 carried on using that stator for many years after everything else stopped doing so (though there may be others).