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High pitched whine at 3k RPM

Discussion in 'XJ Technical Chat' started by chuck101, Mar 27, 2008.

  1. chuck101

    chuck101 New Member

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    Is it normal for my 650 Seca to have a high pitched whine that sounds like it is coming from the engine at about 3 grand in most any gear?
    The engine runs like a top otherwise and I have changed the motor oil and rear gear oil.

    Thanks.
     
    chuck101, Mar 27, 2008
    #1
  2. RickCoMatic

    RickCoMatic Well-Known Member

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    Yes. It is normal!
    Especially if you are running the bike with a "Lightweight Oil"

    That noise is the infamous "Yamaha Middle Gear Whine"

    Personally, I kinda like it, myself. Reminds me that I don't have to adjust chain slack, oil the chain, replace sprockets ... all chain drive related stuff.

    But, just to be sure it ain't something else ... Get a book and do a "Manual Cam Chain Tensioner Re-set"

    Take all the slack-up out of the Cam Chain ... just to be sure it IS NOT a case of Cam Chain Slack happening!
     
    RickCoMatic, Mar 27, 2008
    #2
  3. chuck101

    chuck101 New Member

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    Sounds good. Thanks for the information.
     
    chuck101, Mar 28, 2008
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