640 ADV KabOOm ...

Discussion in 'Thumpers' started by 640 Armageddon, Jan 10, 2013.

  1. 640 Armageddon

    640 Armageddon Do or Do Not. There is no try.

    Joined:
    Mar 4, 2009
    Oddometer:
    3,559
    Location:
    Greece
    Hi Bill,

    At the moment it is all stock, I was thinking of an fcr and an Acra but not sure. I am basically not sure about the fuel consumption. At the moment the bike could easily do 500 km on pavement and 400-450 gravel. It should not change much but don't know :huh
    Wanted to change the bike big time before but got busy with building the Navigation Tower and that took some fare amount of time. I am in search of the 660 rear tanks. Was going for a proper Rallye bike :evil

    D.
    #21
  2. Alik

    Alik viertaKTMotor *****

    Joined:
    Nov 7, 2010
    Oddometer:
    270
    Location:
    Poznan, Poland
    640 Armageddon, hi there!

    sorry to hear about your bike. The same thing happened to Tseta's bike and another friend of mine too (check the pictures from the rebuild at http://motoazja.pl/naprawa-ktm-lc4-640-adventure.html). So this exact bearing is prone to wear and should be changed when doing a full rebuild anyway.
    People do change just one side of the engine (I know it is a little unorthodox) but it involves more work (you have to shim the crankshaft again) and knowledge while doing a rebuild.
    If you won't will do it yourself then it means money. Easy and cheap solution is to buy a decent state 2003 engine (could be from a SM as you already suggested), do at least a decent revision (top end, examine the barrel and the piston, measure the wear, then decide if and what to change) and ride on.
    It is not hard to do - and there are some very helpfull and knowledgeable inmates here which are willing to help.
    Take care. You can do it.
    #22
  3. Dolly Sod

    Dolly Sod I want to do right, but not right now

    Joined:
    Aug 18, 2003
    Oddometer:
    15,087
    Location:
    Richmond, Va

    From the photos it doesn't look like there's any way to inspect the bearing either. I guess you gotta keep an eye out for swarf in the oil. Surprising that the needle bearing failed before the ball bearing.
    #23
  4. 640 Armageddon

    640 Armageddon Do or Do Not. There is no try.

    Joined:
    Mar 4, 2009
    Oddometer:
    3,559
    Location:
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    Cheers for the replies :freaky

    I think the only way to inspect the bearing would be to take the left cover out, but a dial gauge on the rotor and check for eccentricity. If you see the dial gauge moving around you should be able to pick that up.

    I am waiting for the engine, the supplier said that he may be able to find a from a newer model (04 or 05 ... ) The newer the better because I think they will be in a better condition. As you suggested working from top to bottom would be the best approach but I really want to take this thing to bits and restore everything that can cause such a large damage, I am planning to do the Serres Rally at the end of August with the bike and I really cannot afford another engine damage during a race. I mean, it can happen, but I want to minimize the chances of it happening... :D

    D.
    #24
  5. thanosktm620

    thanosktm620 Adventurer

    Joined:
    Aug 17, 2009
    Oddometer:
    20
    Location:
    Athens Greece
    Can you tell us the name of the Mechanic....just in case.:evil

    How can we avoid such "KabOOM"?:ear
    #25
  6. kyns

    kyns Long timer

    Joined:
    Feb 25, 2009
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    3,635
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    When you had your engine rebuilt did you tell the mech to go trough the transmission too ?

    You sure the bearing was worn out allready back when the rebuilt was made ?

    Shit happens... not the mechanics fault IMO.
    #26
  7. 640 Armageddon

    640 Armageddon Do or Do Not. There is no try.

    Joined:
    Mar 4, 2009
    Oddometer:
    3,559
    Location:
    Greece
    The engine was rebuilt 5000kms ago, indeed I told my mechanic to check everything that needs to be checked for the bike's mileage (65k at the time). He knows ktm very well but he lately developed an attitude ''I will fix it only when it breaks''... he kept for example telling me that my other bike, a berg, will die and that I have to start saving money. As an engineer I asked him ' what will fail and why ' . The answer was ' because it will ' . I contacted Taffy a well known person in Husaberg. Org and he provided me with a list of things to change. I changed them. The valves were past their service life.... Just waiting to break....
    I know he did not change it because I do not have it on the parts that he gave me. And if he did, I really do not believe that the service life of a bearing is 5k....

    Shit happens and we move forward, that's what I'll do :deal
    #27
  8. Alik

    Alik viertaKTMotor *****

    Joined:
    Nov 7, 2010
    Oddometer:
    270
    Location:
    Poznan, Poland
    Well, that is an attitude which's not very "compatible" with the KTM bikes - as Bill writes in the signature - high performance = high maintenance :D
    I would say You have to change your mechanic for a more reasonable one. If You need any help in preparing your bike just ask here - people around surely will help you out of the trouble.
    #28