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Thread: R1200R USA vs International Specifications

  1. #1
    Registered User
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    Question R1200R USA vs International Specifications

    R1200R

    BMW Motorrad USA site says SOHC.

    BMW Motorrad International site says DOHC.

    Are they both correct?

  2. #2
    Rally Rat
    Join Date
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    Quote Originally Posted by Undermoose View Post
    R1200R

    BMW Motorrad USA site says SOHC.

    BMW Motorrad International site says DOHC.

    Are they both correct?
    USA 2010 and up DOHC I have one.

  3. #3
    A bozo on the bus deilenberger's Avatar
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    Spring Lake NJ, USA
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    Sounds like the BMW US site needs an update. The original hexhead engine has a single camshaft mounted lower in the head that uses small followers and pushrods to activate rockers that open the valves. The "camhead" engine has camshafts - two of them per cylinder (hence DOHC) that sit higher in the head, which almost directly act on the valve (no pushrod, no rockers) through a finger follower where one side rides on the cam lobe, the other side has a semi-sphere (1/2 sphere) that presses down the valve stem opening the valve, and the sphere comes in different sizes so the clearance can be adjusted.

    Whew.

    Short story - BMW Motorrad US website is screwed up. Not a surprise.
    Don Eilenberger http://www.eilenberger.net
    Spring Lk Heights NJ NJ Shore BMW Riders New Sweden BMW Riders
    '07 R1200R (current ride) and some bimmers.. and a Porsche

  4. #4
    A bozo on the bus deilenberger's Avatar
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    Quote Originally Posted by DROOT153718 View Post
    USA 2010 and up DOHC I have one.
    Almost. The R12R didn't get the camhead engine until 2011..
    Don Eilenberger http://www.eilenberger.net
    Spring Lk Heights NJ NJ Shore BMW Riders New Sweden BMW Riders
    '07 R1200R (current ride) and some bimmers.. and a Porsche

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