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ZX-11 issues....

Discussion in 'Mechanical & Technical' started by Watchmaker, Mar 1, 2010.


  1. Watchmaker

    Watchmaker
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    was wondering if anyone else here, that may have had or currently has a zx-11 ,may have had the same issues I am having.
    at taking off the bike sometimes,not always, has a bit of noise like it is
    detonating. had carbs re-worked this last winter thinking it may have been the problem, but yet it still is happening. having been the 3rd owner of this bike, not sure what has been done to it prior. it runs out fine once past the off idle issue...I always run 92 or better octane gas...
    any ideas?thoughts?

    would like to get this resolved before my vacation in july.

    thx,
    West
     
  2. dragracer1951

    dragracer1951
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    Three possible things.
    Carbon deposits in the combustion chamber may contribute to detonation.
    Advanced ignition timeing will do the same.
    And a lean condition can cause detonation.
    Have a look at your plugs. If they have black deposits, this could be a hot spot detonating.
    Things to think about...
     
  3. Arnbo

    Arnbo
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    Have you checked your clutch plates?:scratchea
     
  4. Watchmaker

    Watchmaker
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    currently have the largest jets from the kit in carbs...put new plugs in 1k miles back when we did jets.....not running rich,even with these jets. plugs look like they should.
    didnt change the issue...

    was thinking that maybe someone has changed the timing,not sure how to check that yet....but going to look into it...

    and Arnbo, would the clutch do that on one of these?.....seems it wants to do this more so when the engine gets warmed up.

    I had to put a new clutch in one of my old bikes, I dont remember it making this kind of sound!:scratchea
     
  5. dragracer1951

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    If it's happening with heat in the motor, it's either compression or iggy or a combination of both.
     
  6. bubba_zenetti

    bubba_zenetti
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    #3 rod bearing starting to go out will sound like detonation. the most common death for a zx11.

    arnbo, worn clutch plates wont make noise;)
     
  7. FastCat

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    ...worn out chain and sprockets will...

    ...just sayin'...
     
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