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Discussion Brisbane-Phillip Island

Discussion in 'Rides and Events - Clubs and Groups' started by DanoHosko, Jul 24, 2022.

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  1. DanoHosko

    DanoHosko Well-Known Member Premium Member

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    Maybe the cam chain has come loose and slipped a tooth?
     
    DanoHosko, Oct 17, 2022
    #41
  2. Why?

    Why? Active Member Premium Member

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    Bugger
     
    Why?, Oct 17, 2022
    #42
  3. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    The CCT is definitely a weak point on these engines, along with the tiny roller chain. Even the standard morse type chain on the other 250's is beefy compared to what the ZXR's have.

    Hopefully it's just a stretched chain/jumped timing/worn out CCT and not something worse like a bottom end bearing or anything bent/broken in the top end.
     
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    Linkin, Oct 17, 2022
    #43
  4. Frankster

    Frankster Grey Pride...Adventure before Dementia Staff Member Premium Member Ride and Events Crew

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    Bugger indeed! Awful way to end your adventure. It does sound terminal, but maybe it's not.
     
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    Frankster, Oct 17, 2022
    #44
  5. jmw76

    jmw76 Well-Known Member

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    That is a shame.
    Concentrate on getting home safely in the support vehicle for now.
    When you are back home, you will need to have a really good look at everything.
    Start by pulling the plugs and having a look at their condition. If something has gone a miss internally it will often show on the plugs. Either by way of abnormal colour or damage/strange deposits.

    Good luck.
     
    • Like Like x 1
    jmw76, Oct 17, 2022
    #45
  6. DanoHosko

    DanoHosko Well-Known Member Premium Member

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    Yeah fingers crossed it something easy....

    It was only making the noise when I had the throttle on so I'm hoping it's not a bearing etc?

    But it was that noisy that the guy on the bike behind me said he could hear it (over the usual exhaust noise).

    The cam-chain is new maybe 3000km ago, and i cleaned out the auto-tensioner at the same time, but maybe the tensioner wasnt working correctly

    It definitely started as a tapping then got much much worse in the space of maybe 2km distance


    How expensive am I looking at for a top end rebuild?
     
    DanoHosko, Oct 17, 2022
    #46
  7. jmw76

    jmw76 Well-Known Member

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    It really is too early to give you an idea on cost without knowing all the details.
    It might be just something simple or might be a complete engine rebuild/replacement. Without starting to strip things down you just can not tell.
    Needless to say that engine noises that start to rapidly get worse, particularly coupled with noticable power loss, are never a good thing.
     
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    jmw76, Oct 17, 2022
    #47
  8. DanoHosko

    DanoHosko Well-Known Member Premium Member

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    Fair enough, I'll try and make a start this weekend once i get her back home lol
    Fingers crossed something simple!

    I can't say I'm very experienced in the intricacies of engines though ;)
     
    DanoHosko, Oct 17, 2022
    #48
  9. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Get home in one piece and go from there :)
     
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    Linkin, Oct 17, 2022
    #49
  10. DanoHosko

    DanoHosko Well-Known Member Premium Member

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    Engine still rotates from the crank with a socket wrench, feels about the same as it always has
    I can hear one valve decompressing (1 or 4).

    Can't hear any other valves decompressing, not sure if thats correct.

    Looking forward to the weekends fixing haha!

    I will start a new thread too ;)

    Cheers all for the support!
     
    • Like Like x 6
    DanoHosko, Oct 18, 2022
    #50
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