Another alternator hits the dust and not under warranty

Discussion in 'Parallel Universe' started by C5!, Jul 11, 2011.

  1. BBohemian

    BBohemian Been here awhile

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    Jul 7, 2015
    Oddometer:
    102
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    RTP, NC
    ElectroSport stator and SH775 r/r is good combo.

    SH847 regulator is just too big to deal with. At the moment, someone from AZ is selling genuine SH775 on eBay for $100 shipped (which is $50+ less u would pay to Polaris if buying directly from them)...

    You will also a harness to put it all together. Jack at RoadsterCycle sells super-harness that u can use. He can also get SH775 still, if u don’t want to take chances on eBay and don’t mind paying retail. He is a really good guy and very helpful.

    Edit: the above opinion is based on my install on 2009 F800GS. I’d not put OEM back in.
  2. xcuzzi

    xcuzzi n00b

    Joined:
    Jul 17, 2008
    Oddometer:
    9
    Location:
    Southwest USA
    I replaced the battery and noticed later that it was not charging. I checked battery voltage and it did not increase when the motor was running. After reading some (not all !) of this posting I ordered the Electrotec stator and installed it. The cover came off easy. The hardest part was disconnecting the stator wiring at the plug. BMW did a great job of hiding that. Also, I used silicone gasket maker because the gasket came apart and it did not look like there was any oil in that space anyway . . . when I got it back together, there was pretty significant oil leak from the top of the case, sooo . . . I looked up the gasket on the MAX BMW parts fiche and called San Diego BMW. Stunner, they had it "in stock' so I am headed there to pick up the gasket right now. My F800GS is a 2010. This stator lasted 62K miles, and I did NOT change the regulator rectifier.
    scarygary and =o&o> like this.
  3. rjmorel

    rjmorel Dual Sporticus

    Joined:
    Oct 31, 2005
    Oddometer:
    562
    Location:
    Walla Walla, WA
    Not to beat a dead horse but I just bought a 09 F650GS twin with 43,000 miles on it. After going thru all 65 pages here the issue seems to be the heat generated by the stator and exhaust pipes and not being able to get the heat out. So for talks sake if a good size air vent was made at the top of the case and extended up 6-8" with some baffles so that any oil being flung around inside the case would go partially up vent then drain back down into case would that work for air cooling? And let the hot air dissipate out the top. Maybe a secondary vent hole can be made lower so you would get hot air going out top ,pulling in cooler air into lower vent. Put some filter material over the vent exit end so dirt/water wouldn't enter in thru the vents? Or am I missing something? I think I remember seeing older road bike racers with large holes drilled in the side of the mag covers and they were exposed to the air that way. Some automobile alternators are open also. Just thinking would this be theoretically feasible .
    Kinda like this vented cover that Cafe Husky showed online? rj
    [​IMG]
  4. JRWooden

    JRWooden never attribute to malice...

    Joined:
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    6,809
    Location:
    The great state of confusion
    rj:

    Just my $0.02....

    While that could work ... the flywheel design was updated ~04/12 to be vented and seems to have solved the issue...
    so likely the easiest fix would be to locate one of them ...
    I would guess that would not be too hard....

    Or

    Maybe do what I did back when the new flywheels were very uncommon:

    http://advrider.com/index.php?threa...em-series-style-regulator-r-r-project.890729/

    My 2009 has the series reg. and the Electrosport stator and I have done ~60K miles since then in very hot weather
    (see my avatar) with no issues....

    again... just my $0.02
  5. mustardfj40

    mustardfj40 Been here awhile

    Joined:
    Apr 27, 2012
    Oddometer:
    234
    Location:
    Siicon Valley, California
    My BMW F650GS SE build date is 2/2012 and it has the updated fly wheel. I opened it up to check before buying an updated fly wheel since someone said 4/2012 and newer has the updated fly wheel my bmw stator.jpg
  6. rjmorel

    rjmorel Dual Sporticus

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    Oct 31, 2005
    Oddometer:
    562
    Location:
    Walla Walla, WA
    Mustard, I would be interested to know after you have ridden the bike and got it good and warm, if the RH side case is noticeably hotter then the LH case is? My 09 stator side runs above 200 deg. and clutch side 40-50 deg less using an infrared thermometer. I can really feel a difference with my bare hand. Stator side will burn my hand if left on it very long. thanks.
    Can you take off stator cover without draining the motor oil? thanks rj
  7. RBMann

    RBMann Been here awhile

    Joined:
    Aug 17, 2006
    Oddometer:
    303
    Location:
    North of Seattle
    I had the same issue with the RH side been much hotter than the left. After installing a series regulator and the update flywheel, both cases were the same temperature.
  8. Eurolanc

    Eurolanc Adventurer Supporter

    Joined:
    May 21, 2019
    Oddometer:
    17
    Location:
    Lancaster PA
    My factory stator burned out shortly after getting my bike, I went with the Euro Moto Electrics (EME) upgraded one and it lasted me about a year then burned up. I had them send me a warranty replacement (which they overnighted to me at no extra cost) and that one has been good every since. Huge shoutout for their support and paying the expedited shipping.

    I currently have the hex can, clearwater lights, phone charger and GPS installed. no issues in the past 12 months
  9. rjmorel

    rjmorel Dual Sporticus

    Joined:
    Oct 31, 2005
    Oddometer:
    562
    Location:
    Walla Walla, WA
    I checked my recently purchased 09 F650GS stator and found its coils were black with old style flywheel. I added two 1/8 npt holes one in center of case and one towards the top to add a way for the hea t to get out of the stator case. Black hose in center of BMW case to let air in and an aluminum air muffler towards top of case to let hot air out and keep dirt and water from getting in. Hoping convection of hot air and venturi effect of air muffler shape will pull cooling air thru the stator assembly and cool it down some. Easy to plug holes if it doesnt help I guess, but thought Id give it a try and see. Rj
    20200531_125752.jpg
    20200601_175723.jpg

    Attached Files:

  10. The Maz

    The Maz Clueless and lost

    Joined:
    Feb 14, 2013
    Oddometer:
    556
    Location:
    Medicine Hat , AB
    You are missing an engine mount bolt.
    Unless you took off a set of crash bars to access the cover.
    I don't know about this mod though.
  11. rjmorel

    rjmorel Dual Sporticus

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    Oct 31, 2005
    Oddometer:
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    Walla Walla, WA
    good eye Maz. Yes I removed the engine guards to make it easier to get cover off. rj
    The Maz likes this.
  12. Antti__84

    Antti__84 Adventurer

    Joined:
    Aug 13, 2017
    Oddometer:
    11
    European Colleagues - Especially, but not only...

    I'm working on the update of the drilled flywheel for 09 GS but at the same time looking for update of R/R. As we can see Jack from https://www.roadstercycle.com/ does deliver without problems but I still wonder if there are other suppliers in Europe! I actually ordered a "SH775" from ebay, a big Italian shop (ncdm2000sas) dealing it 50€. Now I have a box on my table indicating that it is "FH020AA" but I'm wondering if someone did the same and runs with it?

    Have you found reliable supply chain for a good RR?

    So many threads around this topic, I hope someone benefits from the collection:

    https://advrider.com/f/threads/f800gs-stator-cooling-system.1415644/
    https://advrider.com/f/threads/oscilliscope-traces-oem-series-style-regulator-r-r-project.890729/
    https://advrider.com/f/threads/burnt-stator-problem-solved.1242648/
    https://advrider.com/f/threads/f800gs-updated-stator-self-installed-info-needed-please.1012539/
    https://advrider.com/f/threads/question-about-changing-the-flywheel.1429809/
    https://advrider.com/f/threads/how-do-you-check-if-the-alternator-is-functioning-properly.685465/
    https://advrider.com/f/threads/voltage-regulator.1379660/#post-37473314

    Thanks, Antti
    nickgindy likes this.
  13. nickgindy

    nickgindy KLR Basher

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    Jun 30, 2011
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    Indianapolis, Indiana
    That is nice to have Antii. Thanks.
  14. nickgindy

    nickgindy KLR Basher

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    Indianapolis, Indiana
    So I made it 14000 more miles (us) and I think my stator is going again. it first went out at 51k. Replaced with an electrosport. Idling voltage is about 13.3 until I rev it. Then I am at 14.4. 2012 BMW F650gs 64050 on odometer now. About 51000 When it first went out enrout to Alaska. Brand new Battery.
  15. nickgindy

    nickgindy KLR Basher

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    Oddometer:
    3,270
    Location:
    Indianapolis, Indiana
    Deciding to have a look today. 20200823_193422.jpg
  16. Antti__84

    Antti__84 Adventurer

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    Aug 13, 2017
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    11
  17. Antti__84

    Antti__84 Adventurer

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    Aug 13, 2017
    Oddometer:
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    The field test of the FH020AA is starting :) This version has no manufacturers stamps - I paid 50€ to dealer in Italy. Seems to give 14V. Let’s see...

    Attached Files:

    bmwroadsterca and nvklr like this.
  18. flei

    flei cycletherapist

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    Apr 1, 2013
    Oddometer:
    12,368
    Location:
    Western Mass.
    Another bike with a stator failure. My 2010 F650GS failed at 53K miles. Glad that I wasn't stranded far from home. Replaced with a "cheap" ~$200 aftermarket stator (not the $700 BMW one!!). Hoping this one will last 30K miles.
  19. JRWooden

    JRWooden never attribute to malice...

    Joined:
    Jul 5, 2008
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    6,809
    Location:
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    The $700 BMW one comes with a new ventilated flywheel that purprotedly corrects the overheating issue....
    Now and then a new design flywheel will show up on ebay...
    roookie1 likes this.
  20. vientoymar

    vientoymar Motorbikes are a drug that change my life

    Joined:
    Jul 12, 2009
    Oddometer:
    82
    Location:
    Madrid
    This is not a FH020AA, it's a SH755.


    SH775 has only two flanges between bots, FH020AA has three.
    Do you check if the bottom has metal sheet or is with epoxy? maybe is a chinese copy.

    I have been seeing undervoltage this days and thinking my system is failing (100.000km, all original except battery). Reading and reading the forum and still don't know very well if the FH020AA is shunt or serial and if it's better than a SH775 for my F8GS '10.
    I'm asking vendors on aliexpress to be able to do a complete harness to connect it:
    [​IMG]

    Attached Files:

    Antti__84 likes this.