Results 1 to 15 of 35

Thread: Stators

Hybrid View

  1. #1
    Registered User fishbmw's Avatar
    Join Date
    Aug 2007
    Posts
    13

    Stators

    I have been hearing rumbles about the F-series stators going out around 20,000-30,000 miles. I just picked up a 650 this summer and plan on putting a lot of miles on, and don't want to have to worry about this on a trip. Anyone else hearing about this?

  2. #2
    wanderer
    Join Date
    Jun 2009
    Location
    Bridport Vermont
    Posts
    92
    Here is a tread fwiw mine is ok at 32k


    http://www.advrider.com/forums/showt...706033&page=40

  3. #3
    Lifetime Member Ridealot's Avatar
    Join Date
    Aug 2004
    Location
    Salem Or.
    Posts
    700
    My F650GS twin stator went out at 39K miles. BMW won't sell just a stator it comes as a kit with a stator and flywheel for the ridiculous price of $900. This kit now comes with an updated flywheel that has holes in it thats supposed to help keep the stator cool. Who knows if it works.

    I wasn't interested in dropping nearly a grand for a simple stator so I bought an aftermarket one from Ricks for $165. You pull the sidecover off and the stator is bolted to the inside of the sidecover. I had to cut off the plug on the end of the stock stator and solder it onto the new stator. Then bolt the stator back onto the sidecover, install the sidecover and I was good to go. Why the kit doesn't just come with a new plug I don't know. Since I bought mine there is another company making stators for the 800's now so maybe its a direct replacement without having to solder anything.

    For the price of the Ricks I can replace the stator 5 times with change left over compared to the price of the BMW one.

    The F800 Riders Forum has a thread that will tell you more than you want to know about the stators on these bikes.
    Tom
    Salem Or.
    '93 K1100LT w/Bushtec
    '03 F650CS '09 F650GS

  4. #4
    Benchwrenching PGlaves's Avatar
    Join Date
    Oct 2003
    Location
    "Big Bend" TX
    Posts
    8,656
    Voni's F800S stator too failed at about 60K miles. I replaced it with one from Rick's. I'm not positive but I believe the windings on the one from Rick's are more robust. I really don't expect another failure.
    Paul Glaves - "Big Bend", Texas U.S.A
    "The greatest challenge to any thinker is stating the problem in a way that will allow a solution." - Bertrand Russell
    http://www.bigbend.net/users/glaves

  5. #5
    Outlander Omega Man's Avatar
    Join Date
    Jan 2010
    Location
    Mansfield,MA
    Posts
    6,394
    I was wondering if the Rick's you are all talking about is Rick's in New Hampshire? OM
    "Well they say.. time loves a hero but only time will tell.. If he's real, he's a legend from heaven If he ain't he was sent here from hell" Lowell George
    2009 F800GS 1994 TW200
    Part of the Forum Threadside Assistance Program

  6. #6
    Registered User
    Join Date
    Aug 2008
    Location
    North Carolina
    Posts
    195
    I've been active on this problem over on ADVRider... so here's a 50,000 foot fly-over:

    The original design flywheel is just a solid "cup" so there is no air cooling to speak of,
    there is no (injected) oil cooling, and the way the stock Regulator works on this bike (shunt style),
    it is always demanding maximum output from the stator ... so.......
    The old design stator gets quite hot (~200C or higher) and in at least some cases the insulation on the windings is compromised.

    The new "ventilated" flywheel from BMW is supposed to help ... albeit at a huge cost.

    I'm not sure if the stator included with the $900 BMW kit is an upgraded design over the original or not....

    Starting at some point in 2011/2012 the regulator was changed slightly to provide a better/higher voltage to the battery;
    it is still the shunt style that runs the stator "flat out all the time" but the higher voltage helps the stator a bit, and the battery likes it better as well.

    The Rick we are talking about is this guy: http://ricksmotorsportelectrics.com/

    This company has also started making a unit: http://www.electrosport.com

    I fed Electrosport the details on the failure mode the bikes have been experiencing and they encorporated some things into the design that the feel will help the situation. They assert they modified the windings to provide a cooler running design
    and are using wire with an insulation rating of 220C.

    I think Rick charges $165 and the Electosport unit is $199

    It is possible to rewind the stock unit as well ... not sure what the result of that would be...
    "Custom Rewind" has been mentioned as a good shop for this type work: (800) 798-7282

    Just for the record: I have no affiliation with any of these outfits

    It does seem funny that the F650GS & F800GS bikes seem to have more trouble with stators than the old F800S / ST bikes?
    Maybe it's just my perception.....

    Paul:
    is the flywheel on your wife's bike just a "cup" design, or does it have some ventilation or oil cooling features?
    Some bikes have a oil passage in the end of the crank that meters a bit of oil into the stator area for cooling....
    I don't think any of the BMWs do that............
    Last edited by jimbob59; 12-30-2012 at 02:42 PM.

  7. #7
    Registered User
    Join Date
    Mar 2011
    Posts
    6

    Electrosport Industries Stator ESG070 for BMW F800ST 2007-2011

    Quote Originally Posted by Ridealot View Post
    My F650GS twin stator went out at 39K miles. BMW won't sell just a stator it comes as a kit with a stator and flywheel for the ridiculous price of $900. This kit now comes with an updated flywheel that has holes in it thats supposed to help keep the stator cool. Who knows if it works.

    I wasn't interested in dropping nearly a grand for a simple stator so I bought an aftermarket one from Ricks for $165. You pull the sidecover off and the stator is bolted to the inside of the sidecover. I had to cut off the plug on the end of the stock stator and solder it onto the new stator. Then bolt the stator back onto the sidecover, install the sidecover and I was good to go. Why the kit doesn't just come with a new plug I don't know. Since I bought mine there is another company making stators for the 800's now so maybe its a direct replacement without having to solder anything.

    For the price of the Ricks I can replace the stator 5 times with change left over compared to the price of the BMW one.

    The F800 Riders Forum has a thread that will tell you more than you want to know about the stators on these bikes.
    I found this one on ebay:
    Electrosport Industries Stator ESG070 for BMW F800ST 2007-2011
    http://www.ebay.com/itm/271058018551...84.m1423.l2649

  8. #8
    Registered User
    Join Date
    Aug 2008
    Location
    North Carolina
    Posts
    195
    Quote Originally Posted by jcarpino View Post
    I found this one on ebay:
    Electrosport Industries Stator ESG070 for BMW F800ST 2007-2011
    http://www.ebay.com/itm/271058018551...84.m1423.l2649
    I'm 100% sure, but I don't think that is the "new and improved" (reduced heat) design for the GS-twins....

    If you need a stator you might want to call ElectroSport to be sure ...

    I think the new design is P/N: ESG831 shown here:
    http://www.electrosport.com/street-b...tml?pt=stators

  9. #9
    Registered User
    Join Date
    Jun 2003
    Location
    Northern Front Range, CO
    Posts
    6,430
    Mine just died at ~30,200 miles. Dealer has bike. He mentioned the unit from Rick's as an option (I asked about aftermarket) but expressed concerns that the magnets might no longer be good in my bike, and there would be no way to diagnose until after installation on the bike.
    Is that accurate that the magnets can not be field tested? (I know so little about electrics, I don't even know where/which magnets he's talking about- in the rotor?) Is a magnet failure a likely associated problem, or is that something I don't need to worry about? Right now, looking at about $1100 to replace with new unit, or maybe $450 to replace with Rick's kit.
    thoughts/recommendations?
    I will be calling BMW Service later this morning; hopefully they will give me some coverage on my out-of-warranty bike, for this too common problem.
    Ride Safe, Ride Lots

  10. #10
    Registered User
    Join Date
    Mar 2009
    Posts
    30
    Quote Originally Posted by fishbmw View Post
    I have been hearing rumbles about the F-series stators going out around 20,000-30,000 miles. I just picked up a 650 this summer and plan on putting a lot of miles on, and don't want to have to worry about this on a trip. Anyone else hearing about this?
    My 09 F650GS stator was failing a month a way from BMW's warranty lapsing. If it was not for Clearwater Lights' CVS, I would have been looking at $700-800 out of pocket. Best $60 I've ever spent.

    http://clearwaterlights.com/infopg_cvs.html

  11. #11
    Registered User
    Join Date
    Aug 2008
    Location
    North Carolina
    Posts
    195
    Rick:

    Yeah... with all the trouble these bikes seem to have with stators, I think a monitor is cheap insurance. Here's what I did: http://f800riders.org/forum/showthre...mp-GPS-adapter

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •