ratcheting sound in front cyl head

Discussion in 'Crazy-Awesome almost Dakar racers (950/990cc)' started by 35xj, Jan 24, 2013.

  1. 35xj

    35xj Been here awhile

    Joined:
    Oct 30, 2008
    Oddometer:
    952
    Location:
    asheville, nc
    some of you have seen this thread,
    http://advrider.com/forums/showthread.php?t=856781

    now im into it, and going throuh it all. im using the 14 mm to run it through to tdc to check valve, rear is fine. front cylinder is making a really strange ratcheting sound, and the cams kinda "ratchet" forward its not on every rotation. but seems to be every couple?
    #1
  2. crazybrit

    crazybrit Long timer

    Joined:
    Mar 16, 2006
    Oddometer:
    8,553
    Location:
    Portland, OR
    Any chance you can upload a video, same to vimeo? Picture is a 1000 words as they say, video is 100,000 :D
    #2
  3. BoulderGuy

    BoulderGuy out ridin'....

    Joined:
    Jan 17, 2008
    Oddometer:
    433
    Location:
    Boulder, Co or lost in Mexico....again
    If its a big "clack" type noise coming from the front cylinder as you turn the motor by hand it is normal. No idea what it actually is. Kind of freaked me out the first time.....
    #3
  4. zedtours

    zedtours Been here awhile

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    Jan 17, 2006
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    385
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    Surrey
    Is it accompanied by flickering oil light? = low oil pressure to tensioner
    If not check cam chain and tensioner.
    #4
  5. 35xj

    35xj Been here awhile

    Joined:
    Oct 30, 2008
    Oddometer:
    952
    Location:
    asheville, nc
    it is happening while the covers are off and im rolling the motor over by hand. been assured by locals that its normal.....
    #5
  6. GrenDesb

    GrenDesb Been here awhile

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    May 6, 2011
    Oddometer:
    331
    Location:
    Qu├ębec
    Yeah, it's when the cam just turn by the top of the lobe and the valve spring push the cam up until the chain slack is taken.

    Don't know if what I wrote is understandable though. :lol3
    #6