Results 1 to 13 of 13

Thread: Valve Adjustment?

  1. #1
    Still plays with trains. tinytrains's Avatar
    Join Date
    Oct 2009
    Location
    Torrance CA
    Posts
    496

    Valve Adjustment?

    So has anyone done a valve adjustment yet?

    Is it the same as the Cam-Head?

    Just curious.
    1988 K75 Low Seat
    2009 R1200R Roadster

  2. #2
    Administrator 20774's Avatar
    Join Date
    Sep 2005
    Location
    San Antonio, TX
    Posts
    13,003
    Kurt -- Forum Administrator ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  3. #3
    Still plays with trains. tinytrains's Avatar
    Join Date
    Oct 2009
    Location
    Torrance CA
    Posts
    496
    Yeah, I saw that. A bunch of people who have not actually done the job, discussing "how it might" be done. I thought by now, someone would have done the deed.
    1988 K75 Low Seat
    2009 R1200R Roadster

  4. #4
    AZrider
    Join Date
    Jun 2006
    Location
    Phoenix
    Posts
    47

    13kmi

    Quote Originally Posted by TinyTrains View Post
    So has anyone done a valve adjustment yet?

    .
    just had 13,000mi service and valves were well within spec.
    R1200WGS 2013

  5. #5
    Kool Aid Dispenser! jimvonbaden's Avatar
    Join Date
    Mar 2004
    Location
    Alexandria, VA
    Posts
    1,182
    Checking is easy, just get top dead center:


    Insert the feeler gauge between the valve shim and the follower and check for spec.

    Adjusting is a bit more complicated as the shims need to come out. So do that the cams need to come out.

    Remove the cam cage:



    The cams literally fall out.

    Lift the follower:


    Use a magnet to pull out the shim.

    Reverse to put back together.

    It is a little more complicated than that, but easily doable by the home tech with standard tools.

    By the way, some info you might find useful:

    LINK TO WETHEAD SERVICE SCHEDULE!

    Link to Tool Lists Download in Word Format!

    Link to Valve Chart!

    Link to Torque Values!

    Jim

  6. #6
    On the Road
    Join Date
    Oct 2010
    Location
    Mount Vernon, WA
    Posts
    29
    Looking good, thanks. Too bad it uses a new style shim. I have a good supply of the hemispherical old style I use on my K bike.

  7. #7
    rabid reader dbrick's Avatar
    Join Date
    Apr 2003
    Location
    Santa Cruz CA
    Posts
    1,754
    Is there an engineering justification for moving from threaded adjuster, to semisphere, to a differently-shaped shim, all for generally-similar 4-valve twins within a period of four years?
    David Brick
    Santa Cruz CA
    2007 R1200R

  8. #8
    Kool Aid Dispenser! jimvonbaden's Avatar
    Join Date
    Mar 2004
    Location
    Alexandria, VA
    Posts
    1,182
    Quote Originally Posted by dbrick View Post
    Is there an engineering justification for moving from threaded adjuster, to semisphere, to a differently-shaped shim, all for generally-similar 4-valve twins within a period of four years?
    I guess you would have to ask BMW.

    BTW, the Camhead has been around longer than 4 years.

    I expect it has to do with reducing the valve check/adjust frequency.

    Jim

  9. #9
    Cam Killer marchyman's Avatar
    Join Date
    Jun 2008
    Location
    SF Bay Area
    Posts
    3,437
    Threaded adjuster for pushrods, shims for overhead cam. Overhead cam is sometimes thought of as better because there are fewer moving parts and less reciprocating mass -- the rods and the rocker arms. Others will disagree that it's a better/worse comparison, just different.

  10. #10
    On the Road
    Join Date
    Oct 2010
    Location
    Mount Vernon, WA
    Posts
    29
    The overhead cam is a vast improvement in valve workings (as mentioned above). Overhead cam systems use shims of one sort or another. I suspect the three year run of the cam head using hemispherical shims was ended because the new shims are lighter, smaller and flat on both sides. Of course there must be other contributing reasons as this is such a totally different engine other than twin opposed. In the new engine the shims just slip into the designed hole on top of the valve stem/keeper in the upper spring retaining disk. Very slick. They cost about $4.50 each and there are 21 sizes. If you work on a couple of bikes you can start collecting a few, but it is turning out that the system is very stable. Official maintenance is; check the valves every 12K miles.

  11. #11
    Registered User BobHancock's Avatar
    Join Date
    Mar 2007
    Location
    Blairsville, GA
    Posts
    11
    I imagine returning the cams to their proper position will be the next instruction needed. Other than that, it looks pretty straightforward. No chains to mess with, just align the gears.
    MOA 7405
    2009 F800GS
    2010 R1200GS
    2010 KTM 690ER, 2010 Husky TE-450

  12. #12
    Cam Killer marchyman's Avatar
    Join Date
    Jun 2008
    Location
    SF Bay Area
    Posts
    3,437
    Quote Originally Posted by BobHancock View Post
    I imagine returning the cams to their proper position will be the next instruction needed. Other than that, it looks pretty straightforward. No chains to mess with, just align the gears.
    If the flywheel is locked or otherwise has not moved then putting the cams back in the same orientation that they were removed should be enough. I'm copying Jim's picture that showed a ruler on the flats of the cam. Remove the cams this way. Install the cams this way.



    Nota bene: if you loosen the cam sprockets (you don't need to and shouldn't) then all bets are off. So don't do that.

  13. #13
    Still plays with trains. tinytrains's Avatar
    Join Date
    Oct 2009
    Location
    Torrance CA
    Posts
    496
    Thank you. That is what I have been wondering about.

    Not as simple as the hex head, but a lot better than a new K-bike.
    1988 K75 Low Seat
    2009 R1200R Roadster

Posting Permissions

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