R1200GS alternator belt replacement advice.

Discussion in 'GS Boxers' started by evilman, Mar 7, 2013.

  1. evilman

    evilman Been here awhile

    Joined:
    Jan 28, 2011
    Oddometer:
    107
    Location:
    Comifornia
    Today i replaced my alternator belt on my r1200gs. At first i couldn't do it than i realized if i take a spark plug or two out than it will be easier to turn the real wheel after that it went on so much easier.

    Just wanted to help people who are strugling with this.
    #1
  2. evilman

    evilman Been here awhile

    Joined:
    Jan 28, 2011
    Oddometer:
    107
    Location:
    Comifornia
    Yes i have the dvd, for me, when i took the right plug out i was easily be able to put the belt on.
    #2
  3. JimVonBaden

    JimVonBaden "Cool" Aid!

    Joined:
    Feb 11, 2005
    Oddometer:
    55,316
    Location:
    Alexandria, VA
    It would be very hard to swap a belt with the plugs in. Sorry if I wasn't clear on that.:deal

    Jim :brow
    #3
  4. roadtrip22

    roadtrip22 Been here awhile

    Joined:
    Jan 24, 2011
    Oddometer:
    332
    Location:
    Apex, NC
    with or without the plugs when I did the belt on my old 2006 GS it kicked my ass by myself. Ended up getting a buddy to help me and it went on easier. I knew the belts had to stretch but wasn't aware on how far it actually had to go. But it's done now. When I have to do it on my new bike 08 GSA. I'll know in advance and be more prepared..
    #4
  5. evilman

    evilman Been here awhile

    Joined:
    Jan 28, 2011
    Oddometer:
    107
    Location:
    Comifornia
    With the plug our obviously you will be able to turm the rear wheel easier. Im done with my 36k service. Vale adj. was easy too.
    #5
  6. 10Cup

    10Cup Long timer

    Joined:
    Oct 23, 2008
    Oddometer:
    2,687
    Location:
    NW Arkansas
    I have 25K on my 2012 GS so thought I'd put a new alternator belt on it.

    Ordered up a new one from the Beemer Boneyard and went to work. I have Touratech crash bars on my bike so had to remove them of course. Wasn't much of a problem at all just took my time. Thanks to JVB's instructions it was a piece of cake.

    I didn't take the plugs out and still was not a problem, turned over quite easily with a 12" crescent wrench. Anyway the old belt was stretched a bit but otherwise looked OK. It had some wear on it and some rubber "dust" was on the cover. Not sure if it was slipping or that was just normal wear.

    Took a few pictures of the old belt for grins.
    [​IMG]
    [​IMG]
    [​IMG]

    Old belt in the sleeve I received the new one in.
    [​IMG]

    Took me about an hour fifteen or so. Nice project on a rainy night. Here's to another 25k safe and trouble free miles.
    #6
  7. JimVonBaden

    JimVonBaden "Cool" Aid!

    Joined:
    Feb 11, 2005
    Oddometer:
    55,316
    Location:
    Alexandria, VA
    :thumb

    Plus, you now have a spare!:freaky
    #7
  8. 10Cup

    10Cup Long timer

    Joined:
    Oct 23, 2008
    Oddometer:
    2,687
    Location:
    NW Arkansas
    Yes, good for emergencies!
    #8
  9. hbkramer

    hbkramer Been here awhile

    Joined:
    Nov 20, 2010
    Oddometer:
    377
    Location:
    Eastern Pa - Center of the Universe
    The sleeve in your pic says 4pk592 Elast.
    My spare says 4PK 611 Elast.
    what is the difference in these belts . Supposedly this is aa spare for my 2005 R12GS (40 amp alternator ) is this the correct belt ?
    #9
  10. JimVonBaden

    JimVonBaden "Cool" Aid!

    Joined:
    Feb 11, 2005
    Oddometer:
    55,316
    Location:
    Alexandria, VA
    One is 592 mm and the other 611 mm. I believe, but am only going from memory, the 611 mm is the right one. IIRC your alternator is 600 watts, so 50 amps.
    #10
  11. hbkramer

    hbkramer Been here awhile

    Joined:
    Nov 20, 2010
    Oddometer:
    377
    Location:
    Eastern Pa - Center of the Universe
    Thank you Jim !! ......for the belt info AND correction on the Amp draw .
    The 4PK 611 belt has written on it in parentheses <592> ,which doesn't make sense.
    The belt is either 611 mm or 592 mm,right?
    Last thing I need are the alternator bearings going south ,if the belt lenght/tension is incorrect.

    I do have your Hexhead DVD(from the Beemer Boneyard guys) , but damned if I can find it in my stuff !!!... very annoying, since I just did the servo bleed on the 2005 R12GS w/o it.
    Thanks Again
    PS to the owner of this thread, MY 2005 GS has 58K mi. and an 07 Final drive done by the PO , and an ICE module installed by me .
    Runs just fine. Plugs are a tad grey after 20 K mi.but that will be covered in another thread.
    #11
  12. JimVonBaden

    JimVonBaden "Cool" Aid!

    Joined:
    Feb 11, 2005
    Oddometer:
    55,316
    Location:
    Alexandria, VA
    #12
  13. mouthfulloflake

    mouthfulloflake Not afraid

    Joined:
    Aug 21, 2008
    Oddometer:
    18,500
    Location:
    N.W. Arkansas
    I was wondering about that Jim!

    The 4pk611 fit my 95 1100gs and was the part number I found here via searching, I was surprised reading that same belt would fit a 1200.

    But if my memory serves ( mine, like yours, is swiss cheesed haha) It did seem like I had to really struggle to get the belt tight, I would likely go with something shorter than the 611mm next time.
    #13
  14. hbkramer

    hbkramer Been here awhile

    Joined:
    Nov 20, 2010
    Oddometer:
    377
    Location:
    Eastern Pa - Center of the Universe
    Ok I decided to stop tempting a brown out at dusk, or worse,so I'm changing it out.
    It (4k611)is a bit smaller in circumference than the BMW original 4pk592 that I just removed from the bike (58K mi.)
    That is to be expected after 58K miles .But ,You would THINK that a 611 belt would be 19 mm LONGER than a 592 belt ,but it's not .

    Also,The 4PK611 is no longer available/shown in BBY ,so I am quite puzzled as to what it actually fits .Also puzzled why the 4PK 611 belt has written on it in parentheses <592>.
    Any Thoughts?
    #14
  15. JetSpeed

    JetSpeed Naviator

    Joined:
    Nov 28, 2007
    Oddometer:
    3,863
    Location:
    KNZY
    I've pulled new belts out of the package that weren't in as good a shape as the OP's old belt.
    #15
  16. Oldbear

    Oldbear Don't want a pickle

    Joined:
    Jun 16, 2011
    Oddometer:
    254
    Location:
    Fin Land
    Continental 4PK611ELAST is actually 592 mm long. It is designed to stretch to 611 mm, thus the name "ELAST".

    IIRC 4PK592ELAST is 582 mm without stretching.

    To add to the confusion Continental also has non-elastic belts with the same name. So they have 4PK611 which is 611 mm long and 4PK611ELAST which is 592 mm (but can be stretched to 611 mm).

    Muy confusing.
    #16
  17. Oldbear

    Oldbear Don't want a pickle

    Joined:
    Jun 16, 2011
    Oddometer:
    254
    Location:
    Fin Land
    Euro Motoelectronics has a useful truly awful summary on their site:

    Continental / Contitech Part #: 4PK611
    Length
    : 611mm
    Application: BMW R Oilhead 4 valve
    Make/Model: BMW : R850, R1100, R1150, R1200C
    Model Years: 1992-2002
    Manufacturer #: 12 31 1 341 779
    EME Part # Belt-4PK611779

    Continental / Contitech Part #: 4PK611ELAST
    Length: 592 mm
    Application: BMW R Oilhead 4-valve, Hexhead
    Make/Model: BMW : R850, R1100, R1150, R1200
    Model Years: 1996-2010
    Manufacturer #: 12 31 7 681 841
    EME Part# Belt-4PK592841

    Continental / Contitech Part #: 4PK592ELAST
    Length: 582mm
    Application: BMW R Series Hexhead
    Make/Model: BMW : R900, R1200
    Model Years: 2005-2011
    Manufacturer #: 12 31 7 690 571 Superseded by (12 31 8 528 385)
    EME Part# Belt-4PK582571
    #17
  18. AntonLargiader

    AntonLargiader Long timer

    Joined:
    Aug 28, 2003
    Oddometer:
    4,354
    Location:
    Charlottesville, VA
    That is a truly awful summary of belt application. Just look at the fiche for your particular bike.
    #18
  19. hbkramer

    hbkramer Been here awhile

    Joined:
    Nov 20, 2010
    Oddometer:
    377
    Location:
    Eastern Pa - Center of the Universe
    Anton, agreed , but that doesn't splain continentals mis or inaccurate info.
    As for Continental, a 592mm belt is 592mm .why then do they label a 611mm belt with a post script of <592>. Confusing to say the least .I find it hard to believe a 4PK611ELAST which is 592 mm can be optimally stretched to 611 mm.(where's Curry when you need him ;)

    Also, I don't need a BMW markup on a alternator belt thats made by probably, continental. The dumbing down of America continues !!
    I am tired of BMW antics (on the car side mostly), so I will buy less and less of their crap ,including an overpriced alternator belt.

    I just sent BMW NA a pic of the wifes new AUDI in response to their "SO WHAT " Attituderegarding their poor quality :

    2008 328xi YTD Quality issues :
    a) 4 broken window regulators ....piss poor design/reliability
    b)water pump .ho hum.....another piss poor design/reliability
    c)Foot well Module Meh, a few bad diodes, not our fault ,blame our suppliers ... yet another piss poor design/reliability
    ......Ya got me going now and the bike div is not far behind.
    PS:So far no problems w the Audi.
    Kramer
    #19
  20. Oldbear

    Oldbear Don't want a pickle

    Joined:
    Jun 16, 2011
    Oddometer:
    254
    Location:
    Fin Land
    Verdammt :D

    Edited the post accordingly.
    #20