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Thread: 2005 K1200S - Valve train noise at startup

  1. #1
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    Question 2005 K1200S - Valve train noise at startup

    I bought my 2005 K1200S about three years ago and it has been making this startup valve train noise ever since then. It only happens at startup and only if I haven't started the bike in a week. The noise sounds like "loose metallic parts rattling around". The noise only lasts for about one second and then disappears. When I bought the bike it had about 18K miles and it now has about 21K miles and it has been serviced regularly at the local BMW dealer. The noise has never gotten any worse in the three years I've owned it. Dealer states that the noise is normal for these bikes and occurs until oil pressure builds up, which happens very quickly. The sound is NEVER heard one-two seconds after startup.

    Any other owners notice this noise?
    2018 R9T

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    Registered User GTRider's Avatar
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    There is a newer-style hydraulic chain tensioner used on the K1300 bikes that does not bleed down as much as the older units. I believe that tensioner can be retrofitted to the K1200S bikes so that may be worth pursuing with your dealer. Ask them to look for an SI bulletin on the matter. Also, have you had the chain jump guard installed on your bike? There is a SI bulletin on that as well.

    Best,
    DeVern
    DGerber
    1983 R80ST — 1984 R80 G/S-PD — 2004 K1200GT w/Hannigan S/C — 2010 K1300GT — 2018 R1200GS
    BMWMOA#52184, AMA#271542, IBA#138

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    Quote Originally Posted by GTRider View Post
    There is a newer-style hydraulic chain tensioner used on the K1300 bikes that does not bleed down as much as the older units. I believe that tensioner can be retrofitted to the K1200S bikes so that may be worth pursuing with your dealer. Ask them to look for an SI bulletin on the matter.
    Thanks for that info. My intention is to sell the bike or trade it in on a new S1000R. I'm getting too old to have eight bikes -- need to pare down.

    Also, have you had the chain jump guard installed on your bike? There is a SI bulletin on that as well.

    Best,
    DeVern
    I don't believe so. I think the dealer would have told me (and charged me ) if they had.

    Thanks!
    2018 R9T

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    Are we there yet? tonyfr's Avatar
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    I have a K1300GT that makes the cam chain noise if I don't ride for over a week (it has the jump guard). What I do now is bump the starter a few times before trying to start it. Let's the chain get a little tension on it and it doesn't make the noise.
    2009 K1300 GT
    1984 Kawasaki ZX750-E1 Turbo
    1990 Kawasaki ZX600R
    2005 R1200 RT - gone

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    Quote Originally Posted by tonyfr View Post
    I have a K1300GT that makes the cam chain noise if I don't ride for over a week (it has the jump guard). What I do now is bump the starter a few times before trying to start it. Let's the chain get a little tension on it and it doesn't make the noise.
    Thanks. I'll definitely give that a try the very next time I start it.
    2018 R9T

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    Question

    Question for the gear-heads: Is a hydraulic cam-chain tensioner common?
    2018 R9T

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    Registered User GTRider's Avatar
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    Quote Originally Posted by 75450 View Post
    Question for the gear-heads: Is a hydraulic cam-chain tensioner common?
    Yes. BMW has used them for a long, long time and they are generally reliable and trouble-free other than a few specific models, and for those BMW has made available an updated version of the tensioner. The most common issue, when there is one, is for the tensioner to lose pressure when the bike is not started for a while. That can result in some noise, primarily chain slap, until the tensioner is repressurized. On the wedge-k bikes up through the K13GT, that loss of pressure could in some circumstances allow the cam chain to jump a tooth or two on its sprocket, sometimes with disastrous results. Hence the updated tensioner and plastic “cam chain jump guard” for those bikes.

    And, I would be hesitant to assume the presence/absence of the guard on a wedge-k has been verified by the dealer unless that’s been explicitly stated. The check is simple; just remove the T-60 Torx plug on the lower RH side of the engine and look so see if the guard is present.

    Best,
    DeVern
    DGerber
    1983 R80ST — 1984 R80 G/S-PD — 2004 K1200GT w/Hannigan S/C — 2010 K1300GT — 2018 R1200GS
    BMWMOA#52184, AMA#271542, IBA#138

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    Quote Originally Posted by GTRider View Post
    Best,
    DeVern
    Thank you sir!
    2018 R9T

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    Registered User GTRider's Avatar
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    Quote Originally Posted by 75450 View Post
    Thank you sir!
    You are quite welcome!

    DeVern
    DGerber
    1983 R80ST — 1984 R80 G/S-PD — 2004 K1200GT w/Hannigan S/C — 2010 K1300GT — 2018 R1200GS
    BMWMOA#52184, AMA#271542, IBA#138

  10. #10
    Registered User cjcs's Avatar
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    Quote Originally Posted by tonyfr View Post
    I have a K1300GT that makes the cam chain noise if I don't ride for over a week (it has the jump guard). What I do now is bump the starter a few times before trying to start it. Let's the chain get a little tension on it and it doesn't make the noise.
    A new o-ring on the cam chain tensioner piston should hold oil pressure for more than a few weeks of not running.
    It worked for me.
    Carl S.
    BMWMOA #11500

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    Timing chain or cam chain?

    Just for clarification . . . I've been reading up on cam chains and timing chains. Apparently the correct terminology: a "timing chain" is the chain(s) that drive the cams from the crankshaft. A "cam chain" is only between (dual?) cams. So, in this case, which are we talking about? Timing chain tensioner or cam chain tensioner? I assume its the timing chain.
    2018 R9T

  12. #12
    Quote Originally Posted by 75450 View Post
    Just for clarification . . . I've been reading up on cam chains and timing chains. Apparently the correct terminology: a "timing chain" is the chain(s) that drive the cams from the crankshaft. A "cam chain" is only between (dual?) cams. So, in this case, which are we talking about? Timing chain tensioner or cam chain tensioner? I assume its the timing chain.
    I consider the terminology to be a difference without distinction, at least on a BMW motorcycle. The chains on BMW motorcycles drive one or more cam shafts from the crankshaft, and in no case that I am aware of do they just connect two or more cam shafts. If there is such a case I stand to be enlightened.

    To compound the matter BMW calls the tensioner a "cylinder f chain tensioner" on Oilhead engines and a Timing chain on a K75 engine and a G310GS engine. I didn't bother to look up any other models.
    Paul Glaves - "Big Bend", Texas U.S.A
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  13. #13
    Debbie's Servant Lee's Avatar
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    Quote Originally Posted by PGlaves View Post

    To compound the matter BMW calls the tensioner a "cylinder f chain tensioner"

    .
    Guess what F stands for when the chain jumps a tooth on a K1200S/R/GT.
    Lee
    2016 R1200RS
    MOA # 30878
    Past BMW Bikes: 2011 K1300S, 2003 K1200RS, 1991 K75S, 1987 K75T, 1984 R100RT

  14. #14
    Left Coast Rider
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    Quote Originally Posted by Lee View Post
    Guess what F stands for when the chain jumps a tooth on a K1200S/R/GT.
    "...Fer cryin' out loud" ?

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