KTM LC4 (640) Thread Index

Discussion in 'Thumpers' started by meat popsicle, Jul 9, 2005.

  1. meat popsicle

    meat popsicle Ignostic

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  2. mrkartoom

    mrkartoom Lurker Extraordinaire

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    Oct 10, 2006
    Oddometer:
    838
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    northeast/western mass
    What worked for me was about 800 hours of re-jetting and testing. :lol3

    I don't remember all of my settings, but I did go way up on the main jet to like 170 I think. The bike had 8 disks in the trap stock and I ended up with 12. I added the KTM Hardparts vented side cover, left the snorkle on, and did the exhaust can gutting mod (cored out the mechanical baffle). I also did the carb slide mod. The bike was absolutely transformed into a new animal.

    I spent many many hours testing and re-jetting trying to get rid of the off-idle stalling when whacking the throttle open wide. It wasn't a big deal because it didn't do it when riding, but I still wanted to fix it. I think I got it as good as it could be with that carb via the idle jet and needle/needle clip position. Sorry I don't have those settings anymore, but I was back to the stock needle. I never touched the stock air jet. I'm sure I was a size or maybe 2 bigger on the idle jet.

    I ran into my bike after I sold it at a local event and several guys that had been riding it were very impressed with the power of the thing. Hope that helps.
  3. Silas

    Silas n00b

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    Seattle
    Thanks for the info, guys. I found the archived stuff in the indexed thread.

    Cheers,

    Silas

    :clap
  4. Chrisbarnes1

    Chrisbarnes1 Been here awhile

    Joined:
    Dec 28, 2005
    Oddometer:
    663
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    Market Deeping, Lincs UK
    I have a 2005 640 Adventure and have managed to acquire a plastic 28 litre fuel tank. The mounting looks the same as my standard tank--and I can't see much difference, if any, in the internal cutouts (do I need to remove the SAS?).
    The real issue I think I have is mounting the frame for the fairing/front screen to the top of the tank--there are no threaded inserts or tapped holes?. I could use self tappers and gaskets and probably seal it ok as the holes will be in "air" most of the time. However, were the earlier fairings mounted in a different way as there is evidence (rub marks) in the right place?

    Regards, CB
  5. meat popsicle

    meat popsicle Ignostic

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    Hey Chris,

    There has been a thread or two on that issue... LukasM has had info... searching... here's one:

    http://www.advrider.com/forums/showthread.php?t=443545
  6. Renazco

    Renazco Formerly AKA Boejangles

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    I'll take a pic of my set-up and see if it helps, give me a day or two..
  7. Chrisbarnes1

    Chrisbarnes1 Been here awhile

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    Market Deeping, Lincs UK
  8. Chrisbarnes1

    Chrisbarnes1 Been here awhile

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    Oddometer:
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    Market Deeping, Lincs UK
    look forward to them--I now realise why the fixings are not there--but it looks like it comes from the same mould (my standard tank even has the tap locations for the RHS (rear))--not used on the bike but used on the plastic version (which doesn't use the standard crossover pipe).

    My favourite for a "fix" is to use the fairing brackets off my tank but instead of bolting them use an outdoor grade of velcro in a strip which should have enough surface area for a good attachment plus allow a degree of vibration absorption (and no extra holes required in the tank--those that are there are into plastic internal "bubbles" so that the hardware never goes through to the fuel).

    Regards, Chris


  9. neumie

    neumie Been here awhile

    Joined:
    Feb 1, 2006
    Oddometer:
    130
    Location:
    Grand Brapids, MN
    My gas tank leaks where a small access panel resides on the clutch side of the engine above the petcock. I "repaired" this twice already and each lasted for some time.

    The first repair was a clean-up of the gasket and refreshing it with a gasket dressing. This lasted for about a month.

    For the second repair I removed the rubber gasket and used WaterWeld a JBWeld product. This was a field repair and lasted 3 1/2 months.

    Here's a picture of the tank. Sorry it is linked and not imbedded.

    http://www.facebook.com/photo.php?pid=32318&l=00630699d0&id=1673251487

    I've searched the index.

    Any suggestions?
  10. i8lusaka

    i8lusaka Guest

    <hr style="color: rgb(204, 204, 204);" size="1"> <!-- / icon and title --> <!-- message --> Hi there
    I have a KTM660 and a DR350 and my question is as follow.
    Shall I sell the DR350 and spend the money on a tank(28l),sub frame (alu original), 21" front wheel and sump gard conversion on my 660 and will it survive Africa UK to SA
    Or keep the KTM for road fun until the trip in 2011 and sell it then and take the DR350.

    would be nice with some pro and cons.
  11. meat popsicle

    meat popsicle Ignostic

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    Probably the best place to ask this question is the LC4 "sign in thread" (in the index), but for long-distance touring the 625 is a better choice than the 350, but not critically-so. I need to find the posts of Carlos in Africa... :evil
  12. i8lusaka

    i8lusaka Guest

    sorry could you move it there then mate :thumb
  13. meat popsicle

    meat popsicle Ignostic

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    sorry but I'm not a moderator. You can post it again in there if you like.
  14. i8lusaka

    i8lusaka Guest

    Ok I thought you where sorry my mis I will do so Thanks
  15. skibum69

    skibum69 slave to gravity

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    easy to make that mistake:lol3
  16. Truckin_Thumper

    Truckin_Thumper low profile

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    what after market clutch perch will work with a stock cable on an LC4e 640?

    I was told the cable end (jacket) is proprietary to KTM.
  17. NICO

    NICO Save the USA

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    This will do in a pinch.

    [​IMG]

    Then you might be stuck shelling out KTM money. I haven't found any aftermarket source, but I haven't looked that hard for them either.
  18. meat popsicle

    meat popsicle Ignostic

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    It looks "bad" here, but that is the point of the Index thread - not to answer questions (NICO :lol3), but to tell people where to go... and no, not to Hades.
  19. LukasM

    LukasM Long timer

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    It depends. 660 as in 660 SMC? Quite a few mods needed as you noted. The KTM will obviously be more fun and also more comfortable as long as you are riding, the DR is a bit easier to pick up in the sand and uses less gas.

    What year and mileage? DR is a low powered and pretty much bullet proof bike. The LC4 has a somewhat mixed track record, you might make it - and lots of them do - without a single hiccup, or the engine could blow up on you without warning. Happened to me....
  20. i8lusaka

    i8lusaka Guest

    Thanks mate you are right I think I will stick to the DR350 for a long trip and keep the 660 for playing