KTM 640 Winter Project

Discussion in 'Thumpers' started by CSF, Oct 13, 2012.

  1. bmwktmbill

    bmwktmbill Traveler

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    David, it would be interesting to restrict the top of the airbox back to snorkle size to see if you get a different reading. Like you I have run my BST40 with the side panel off and it made no difference I could notice.

    I had a mouse issue with my BMW airhead and 'screened' the intake openings to the airbox.

    The motorcycle would not run over 70 mph.
    bill
  2. CSF

    CSF Been here awhile

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    gunnerbuck - I googled your suggestion and found a few threads that described the symptoms that I'm experiencing. I went out this morning and took the connecter off:
    [​IMG]

    2 of the wires were broken and another 2 were just about to snap off their solider points. I'm going to fix it today and fill the connecter with silicone. I'm hoping this is what causing my problems... I'm going to go over my wire loom as well and check for any worn areas.
  3. juames

    juames Have Fun, Don't Die!

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    Woah :eek1 I think I'll be checking mine.
  4. CSF

    CSF Been here awhile

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    Damn it. That didn't help. I still get nothing but the neutral light coming on. This is getting frustrating now...
  5. juames

    juames Have Fun, Don't Die!

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    This might be the trouble, shouldn't the battery be reading more than 12v? Try boosting?
  6. CSF

    CSF Been here awhile

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    Interesting... I put my battery back on the charging system I bought and its showing that the battery is dead... Yesterday when I took it off the charger it showed that it had a charge, but I never got a reading of more then 12.
  7. Dolly Sod

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

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    You've got a dead cell or six. Time to replace that thing.
  8. CSF

    CSF Been here awhile

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    Set up jumpers from my running car to the bike... nothing but that damn neutral light. No lights horn or anything else. I don't know what to do now... I guess I have to start testing if I'm getting any power to the dash?
  9. juames

    juames Have Fun, Don't Die!

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    This may sound too obvious, but did you check all the fuses?
  10. CSF

    CSF Been here awhile

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    yup, checked the fuses.
  11. CSF

    CSF Been here awhile

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    I went and tested the leads to the horn, signals and a few other places with my meter. I get the same reading there as I do from my battery. I'm not getting power to the dash but It sounds like a relay is switching when I turn the ignition, a smaller one close to the horn . The only place the power seems to die is the switches and the dash. The dash worked fine when I removed it though, doesn't seem right that after sitting for a couple months it would go bad. Is there some type of internal battery that needs to charge in there?
  12. Low594

    Low594 Adventuring Creep

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    Similar results for me when I swapped engines. My issue was caused by the 2pin plug that hangs behind the headlights, the purpose for this plug is to disconnect all the electricals, except what is needed for the engine to run. Double check that plug!
  13. CSF

    CSF Been here awhile

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    I downloaded a color wiring diagram and started going through the bike, I corrected a few things and hooked the battery up turned the key... lights! The dash lit up my horn works and then I noticed everything was sort of flashing... like a blinker flashing. I tested the turn signals and they're not working, no led indicators at the dash either. I traced out the flasher, which when I found it was pretty hot. I pulled it and everything stopped flashing. So one problem down, and another one pops up. I'll start tracing back the signals and see where that takes me.

    I'm happy that the dash works though, it feels like progress.
  14. Young-Gun

    Young-Gun KTM Tragic

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    Wiring diagrams are awesome, except for when you buy an older bike and previous owners have replaced wires with colours different to the diagram! :deal
  15. dnrobertson

    dnrobertson Big Bike, Slow Rider

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    Linky for the colour wiring diagram??
  16. CSF

    CSF Been here awhile

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  17. CSF

    CSF Been here awhile

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    After extensively testing my battery and hours of charging with no real effect... I'm pronouncing it dead. I'm looking into a suitable replacement.

    Electrical woes aside, progress needs to be made. A package all the way from California arrived yesterday. So I thought I'd distract myself with something shinny, a Seat Concepts foam and cover.

    I watched their instructional youtube videos and prepped everything according to their instructions and got to work.

    I removed the old seat cover, cleaned the pan. Then sprayed the new foam and seat pan with 3M 77.
    [​IMG]

    I fought with aligning the new foam on the pan a bit, but eventually I won.
    [​IMG]

    I threw the seat cover in the dryer for a bit to warm it up and borrowed my wife's hair dryer to aid in the warming/stretching process... I did however forget to put the dryer back.. that was a bit of a mistake :rofl

    It was a bit of a process to align the cover to my liking. I stapled it down in the back and wasn't super happy with my the way everything looked so I pulled the staples and started over. Once I got the front and back down everything else wen't fairly smoothly. I did find that I had to turn my compressor way down for the stapler, as it was really easy to blow stapes right through the seat cover, leaving a hole. Which was not good.

    [​IMG]

    I'm fairly happy with the way it turned out, although its not as easy as it looks in the videos. It felt really nice to sit on, much better then the old couch cushion that was on there :evil
    [​IMG]

    Next up, carburetor rebuilding...
  18. Young-Gun

    Young-Gun KTM Tragic

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    :lurk
  19. Low594

    Low594 Adventuring Creep

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    I've been wanting to see how they look! Now I know! Looks like the best bang for the buck, still want a Renazco, but I don't have an infinite budget!
  20. juames

    juames Have Fun, Don't Die!

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    Nice job on the seat!:clap

    I did mine in the spring and am really happy with it. It's a vast improvement over the stock.

    [​IMG]