F800GS R/R Mosfet replacement....How to...

Discussion in 'Parallel Universe' started by ebrabaek, Apr 13, 2012.

  1. ebrabaek

    ebrabaek Long timer

    Joined:
    Jan 12, 2010
    Oddometer:
    4,913
    Location:
    Grand Valley, Colorado
    My personal opinion is yes, as the tests I and several others have done concludes that the charging voltage is too low. The Shendigan is a safe bet. I think that the series regulator is better for the stator, but as the charging system is then changed from a shunt style to a series style system, more long term testing is needed... imho. This will help the stator a little bit, as it raises the voltage, by about 0.5 volts, thus taking that draw off the stator.
  2. runnin4melife

    runnin4melife Been here awhile

    Joined:
    Mar 23, 2012
    Oddometer:
    806
    Location:
    "No shit when I was back at Bragg!!!"
    Sounds good enough for me, :pot Also I am playing with the emoticons more than anything, I just thought that was funny. I plan on ordering one in a month or two.
  3. ebrabaek

    ebrabaek Long timer

    Joined:
    Jan 12, 2010
    Oddometer:
    4,913
    Location:
    Grand Valley, Colorado
    He he..... Nothing wrong with that. I think it is good insurance, as mine have been trouble free since the install.:D
  4. Gangplank

    Gangplank Advenchaintourer

    Joined:
    Jul 20, 2003
    Oddometer:
    2,321
    Location:
    Las Vegas
    Thinking about one in the next few months as well. Right now my bike is soooo burried in a full garage I can't even get to it to change the oil. :-( :shake
  5. fernan_ci

    fernan_ci Been here awhile

    Joined:
    Mar 16, 2008
    Oddometer:
    201
    Location:
    Spain
    Excelent post, I had problem with my regulator too and I bought Shindengen mosfet fh020aa F800GS kit to Jhammer HERE (all perfect with him)

    Now I´m going to install it and I would like to keep original connectors, so If I didn´t understad bad, this is the original regulator.

    [​IMG]

    [​IMG]

    And, should be something like this???

    [​IMG]

    [​IMG]

    Is this correct???? or should I install the fuse too????
  6. ebrabaek

    ebrabaek Long timer

    Joined:
    Jan 12, 2010
    Oddometer:
    4,913
    Location:
    Grand Valley, Colorado
    This is correct. The fuse is up to you. You don't loose anything, perhaps except for the aesthetics. Meaning that the fuse is big, and do not add in the looks department. But for safety, I added mine, as it will catch any short that finds it's way back to the r/r. Fuses are a good thing, as they take up little space, and add another level of protection. They usually don't blow, unless something goes wrong. If the new R/R shorts out, rather than your battery shorts, or perhaps canbus disengaging, the fuse will just blow. I fly airplanes for a living, and have been saved many times by fuses ( Circuit breakers), as each circuit needs one.... or two.....:D
  7. fernan_ci

    fernan_ci Been here awhile

    Joined:
    Mar 16, 2008
    Oddometer:
    201
    Location:
    Spain
    Thanks for your fast reply ebrabaek. I´ll install the fuse too :freaky
  8. ragtoplvr

    ragtoplvr Long timer

    Joined:
    Oct 18, 2007
    Oddometer:
    6,887
    Location:
    central USA
    The Sindigen regulators are very reliable. A fuse will prevent a failure from making more problems. The fuse is optional. It is one more thing to give trouble. These things are not normally fused. OE was not fused.

    Note I did not give an answer, I stated the issues. Your call, they work well both ways.

    Rod
  9. ebrabaek

    ebrabaek Long timer

    Joined:
    Jan 12, 2010
    Oddometer:
    4,913
    Location:
    Grand Valley, Colorado
    I agree, and perhaps my reply sounded like if the Shendigan gives up the ghost.... I should have said, if anything shorts.... Like wires chafing, due to vibration..... off-roading....etc. Anything can short out.... some things easier than other.....:D Mine is still going full tilt, with no issues.:clap
  10. fernan_ci

    fernan_ci Been here awhile

    Joined:
    Mar 16, 2008
    Oddometer:
    201
    Location:
    Spain
    Thanks guys, I finished all and it´s ready to install on the bike (tomorrow). Should be just plug and play :thumb:thumb

    [​IMG]

    [​IMG]

    [​IMG]
  11. JRWooden

    JRWooden Long timer

    Joined:
    Jul 5, 2008
    Oddometer:
    4,346
    Location:
    The great state of confusion
    What diameter/gauge of wires are you using for your lead set?

    In the original design I think they used two strands of 1.25mm diameter wire each for the red & black,
    (Here in the USA that would be roughly 2 x 16 gauge)

    and 2.0mm for the three yellow stator wires
    (Here in the USA that would be roughly 12 gauge)

    You do NOT want anything smaller than OEM, and larger would be Better!
    For single strand I would use at least 12 gauge / 2.0mm for all connections...

    Just bringing this up as I can not judge the size of your wiring from the picture....

    PS: This is the chart I used to convert wire sizes, it should be accurate:
    http://www.technick.net/public/code/cp_dpage.php?aiocp_dp=guide_awg_to_metric
  12. fernan_ci

    fernan_ci Been here awhile

    Joined:
    Mar 16, 2008
    Oddometer:
    201
    Location:
    Spain
    The 3 yellow ones are original from BMW regulator (I don´t know the diameter) , and red and black ones for the other connector are the ones from the "kit", are wider than yellow ones (they are marked as 10 gauge)

    You can check it here: http://motoelectrixcom.myshopify.co...indengen-r-r-kit-for-bmw-f650gs-f700gs-f800gs

    KIT INCLUDES
    * WEATHER PROOF CONNECTORS FOR SHINDENGEN REGULATORS
    *COMPLETE INSTALLATION INSTRUCTIONS WITH PICTURES
    *WEATHER PROOF MAXI FUSE HOLDER
    *30Amp MAXI FUSE
    *3 FT OF 10 GAUGE COPPER MULTI STRANDED WIRE RED
    *3 FT OF 10 GAUGE COPPER MULTI STRANDED WIRE BLACK
    *2 RING TERMINAL 3M (POS. RING TERMINAL W/HEAT SHRINK END) BARE TERMINAL FOR GROUND
    *1 LASER CUT BLACK ANODIZED BRACKET 1/8" THICK MADE OF T6061 ALUMINUM, TO MOUNT THE R/R IN OEM LOCATION
  13. fernan_ci

    fernan_ci Been here awhile

    Joined:
    Mar 16, 2008
    Oddometer:
    201
    Location:
    Spain
    How it fits to my bike :thumb:thumb

    [​IMG]

    Before at idle (red led on the pannel=not charging)

    [​IMG]

    Now the led it´s green, all working perfect!!!!

    [​IMG]
  14. ebrabaek

    ebrabaek Long timer

    Joined:
    Jan 12, 2010
    Oddometer:
    4,913
    Location:
    Grand Valley, Colorado
    Fantaboulistic....... Looks real good. JHammer, put a good kit together. So if I understand this correct, your R/R was bad, as indicating by the red charge light, and low voltage, and the new R/R fixed it. This is the first stock R/R I have seen go bad, at least to the best of my recollection. What did it raise the charging voltage to..... Just curious.??? I suppose your bike will have many great rides ahead. Great job....
  15. JRWooden

    JRWooden Long timer

    Joined:
    Jul 5, 2008
    Oddometer:
    4,346
    Location:
    The great state of confusion
  16. JRWooden

    JRWooden Long timer

    Joined:
    Jul 5, 2008
    Oddometer:
    4,346
    Location:
    The great state of confusion
    This guy did at least some of the measurements you proposed :wink:

    http://hildstrom.com/projects/buellregulator/index.html
  17. ebrabaek

    ebrabaek Long timer

    Joined:
    Jan 12, 2010
    Oddometer:
    4,913
    Location:
    Grand Valley, Colorado
    If some one would send me a series R/R, I would gladly beta test it, work with the manufacture to tune the kit to the 8GS....:evil:evil
  18. Full Power

    Full Power Long timer

    Joined:
    May 30, 2006
    Oddometer:
    1,653
    Location:
    Homer, Alaska
    The 2013 models have relocated the Regulator, is it the same part number as the older units ?
    Is BMW using a higher charge voltage on ALL the bikes now, or is it 'luck of the draw" ?
  19. JoelWisman

    JoelWisman Long timer

    Joined:
    Apr 22, 2009
    Oddometer:
    1,392
    Location:
    STL, MO, USA
    I don't know for certain as I no longer have a valid reason to pester technical regularly, but I do know a few things.

    The F8GS was originally spec'd to have a gel deep cycle battery but the cost of the custome sized battery ended up being too high.

    The voltage regulators had already been produced with a gel charging algorithm, hence the originally sub optimal charging voltage.

    I strongly suspect all k7x bikes after a certain date have an AGM charging voltage.

    P.S. Shit like this is common across every manufacture I have ever worked for or had friends that worked for. You launch with the product you have, not the one you wish you had. (Modified from a Don Rumsfeld quote)

    Enjoy the ride!