KTM 380 Anyone?

Discussion in 'Thumpers' started by Griff, Apr 19, 2006.

  1. Griff

    Griff alpha lurker

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    Just picked up a very clean, '99 KTM 380, and there is very little information in regards to the model on the internet.
    I have previously owned a 520 KTM, and a '00 250 WR and '76 390 WR Husky.
    Wanted any experiences with the big two stroke, and any recommendations, and advice from past owners, and riders of this bike.

    Thanks,

    Griff
    #1
  2. oldasdirt

    oldasdirt Been here awhile

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    Thay are super touquy sonofaguns. You'll love the thing if you like big thumpers. That about the only bike besides trials 2 strokes I'd call a thumper. oldasdirt:wink:
    #2
  3. KenR

    KenR Long timer

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    Gobs of torque and a really fun bike to ride. I have one of it's predecessors, a '97 KTM 360MXC that's pretty much mothballed now.

    By '99 KTM made a number of improvements to the chassis to make them actually turn. Dicks Racing did some engine and suspension work on my '97 and it made a HUGE difference in all areas.

    The 380 is a motor that doesn't like to be twisted on...it has great low and mid-range power but isn't really a high revver.

    Congrats on the new ride!
    #3
  4. oldasdirt

    oldasdirt Been here awhile

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    By the way where did you find a 380 at? I was going to get one but they didn't have one in the whole state when I bought my first DRZ. I've rode the 360 before and knew it came from that motor. It was more fun than should be allowed damn near it. oldasdirt
    #4
  5. Orangetwin411

    Orangetwin411 Katoom Rider

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    I have a 02 380SX. It's a ton of fun on the track and not half bad in the woods with stock gearing. I bought mine last fall as a very long awaited leftover. The last of the big bores so to speak. There's a bunch of jetting info over on KTMTalk.com. Mine is still stock and I have no complaints. Keep on eye out for loose bolts, it has a tendancy to vibe a bit :eek1 .
    #5
  6. cRAsH

    cRAsH Banned

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    Just joined the big bore 2t world with an '01 380 EXC.

    What a fun ride.

    Has anybody got one that doesn't spooge like crazy?

    [​IMG]
    #6
  7. LILBIT

    LILBIT Ride you must.

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    I should have my 380 next week to swap out with my 300. Really curious how much more she'll have. Hope the jetting doesn't take to long.
    #7
  8. cRAsH

    cRAsH Banned

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    The "more" is the increased luggability, really.
    My 300 is fast enough to scare the shit out of me, the 380 just adds a bit more torque to the equation. :deal
    That and an adjustable power valve. Make sure you play with that, it's the cats meow for adjusting the "hit" for different situations.

    Seems like jetting is the big bugaboo, along with the spooging.
    #8
  9. LILBIT

    LILBIT Ride you must.

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    More chug sounds great. Honestly my 300s bottom is fine in 1-2 gear it's 3rd and up i would like more. On the pipe the 300 is more than i want half the time offroad. No problem on the PV. I tend to tweak small amounts to match the needle and my needs. Different needle tapers make much bigger changes.
    #9
  10. cRAsH

    cRAsH Banned

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    Maybe I could pick your brain about that?
    I'm running the JD red needle on the #1 clip, and a 35 pilot (7200' elevation)
    yet it's still blubbery at 1/8` throttle opening. If I short shift it clears up just fine and lugs along beautifully.

    Any hints?
    #10
  11. IndyTim

    IndyTim Been here awhile

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    Cool - I just bought a 380 also. It's on its way, being shipped from AZ. I hope it's not the same one you just bought, or at least one of us in trouble. :deal


    There is a dedicated 380 thread over on KTMtalk, in the Oldies but Goodies / Big Bore KTMs thread: http://ktmtalk.com/index.php?showtopic=159057

    Stay in touch
    #11
  12. LILBIT

    LILBIT Ride you must.

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    I know tons of people love their JD needle but the problem is you only have two optons. Red or blue. The chance of you getting it just right with only two choices is slim. The worst range to tune is the 1/16-1/8. Can be hard to tell barely lean or barely rich at 1/16 throttle as well. If you are rich at 1/8 i'd normal look for a clip change. If it's close half a clip. If the problem is below in the first crack to maybe 3/16 then you need to change diameters. This is the problem with only having two available. I have no experience with JDs needle and i'm not trying to bad mouth them but i like options so i have many needles from Sudco. Let me get done with my new motor and i can send you a few to try if you want. Possible you are to far outside the norm at 7500' to run what you have. Other option is a leaner slide then richen up the idle to 1/16.Are you sorry you asked yet? What slide do you have?
    #12
  13. BuellDualSport

    BuellDualSport Banned

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    Tim

    Link required registration.

    Is that correct?

    Thanks
    #13
  14. potatoho

    potatoho Cheese and Rice!

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    One of the last things I did to my old 300 was to close up a leak in the choke circuit of its PWK carburetor. I suppose on the smaller bores, the choke plunger seal for the air passage is fine, but on mine it allowed a significant amount of unmetered air into the motor. This screwed up the off-idle running.

    On the PWK the simple solution was to plug up the large choke port on the intake bell. This eliminates the high-idle for starting, which can be a problem. The benefit is that it will give a more consistent air-fuel draw at part throttle, making it easier to dial in for best power.

    You can also experiment with different slides. And I prefer the triple taper needles so I bought a bunch of them and picked the one that felt the best. A bit harder to dial in but you get a nice off-idle hit with them that works wonders for sand and short shifting.
    #14
  15. cRAsH

    cRAsH Banned

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    Yeah, in retrospect I could have bought a bunch of needles/jets for the price of the JD kit. :baldy

    Live and learn.

    I'm running a 7.0 slide (Slavens grind). The issue is right off idle, so I'm thinking needle diameter?
    It came with a NOZI needle, maybe I should try it with the 35 pilot?

    Anyway, thanks for your help and good luck with your new motor!
    #15
  16. F_G

    F_G new2ds

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    I had an '02 380EXC and seem to remember the needle I ran being an N3EW which was one taper leaner than stock. And did go down to a 35 pilot. However this information may be unreliable as that was 4 years ago and I seemed to have thrown away my settings. Great bike, definitely a low to mid engine, did vibrate a bit though.
    #16
  17. cRAsH

    cRAsH Banned

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    Cool, thanks for the input.
    How did you find the leak?
    #17
  18. Loadedagain

    Loadedagain making chips

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    my favorite thing about the 380 is it's second/third gear usage... you really don't need any other gears. it will idle right down in the twisty stuff, then shoot like a rocket when needed. +1 vote for best two stroker ever.
    #18
  19. potatoho

    potatoho Cheese and Rice!

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    I was experimenting with different choke plungers, i.e. using a PWM version in a PWK, and I noticed that a poor fit caused problems. The PWM fit was not as good, and the symptom was that it magnified the part throttle sputter. So the PWM choke was not good in a PWK, but also it made me wonder about the stock PWK choke.

    So then I capped off the intake hole and tested it, and it significantly reduced the part throttle sputter. Choke operation is different, in my case it's actually an improvement, but in most tunes the removal of the high choke idle speed causes harder starting.

    Anyways, that's just one problem with these crapuretors. The float system is a joke.
    #19
  20. cRAsH

    cRAsH Banned

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    :nod

    I hauls my big ass around no problemo.
    #20