The KDX thread

Discussion in 'Thumpers' started by gplassm, Aug 13, 2010.

  1. retroone

    retroone Long timer

    Joined:
    Jan 11, 2006
    Oddometer:
    1,871
    Location:
    albq NM
    :waveNice picture.
  2. AtomicGeo

    AtomicGeo Yep, ranked 49th.

    Joined:
    Jul 6, 2007
    Oddometer:
    5,029
    Location:
    Los Alamos, Northern NM

    Got alot of vids...:D

    There was alot of water, rocks and mud. :1drink
  3. retroone

    retroone Long timer

    Joined:
    Jan 11, 2006
    Oddometer:
    1,871
    Location:
    albq NM
    My 2014 350exc-f came in today. :clap Riding the KDX this weekend. :evil
  4. DirtyDog

    DirtyDog Omnia mea mecum porto

    Joined:
    Apr 27, 2007
    Oddometer:
    9,485
    Location:
    Tulsa... it's OK
    Me too. Competing in an endurocross this Saturday night.:eek1
  5. sailorcolin

    sailorcolin sailor

    Joined:
    Feb 8, 2010
    Oddometer:
    78
    Location:
    Rock Hill , SC
    I jsut got a plated 94 200. Anything i need to know?! sorry im a newbie :deal
  6. Huskyfatman

    Huskyfatman Stinky Wizzleteats

    Joined:
    Oct 23, 2007
    Oddometer:
    2,423
    Location:
    Destroying skid plates
  7. DirtyDog

    DirtyDog Omnia mea mecum porto

    Joined:
    Apr 27, 2007
    Oddometer:
    9,485
    Location:
    Tulsa... it's OK
    Went out on the trails early this morning. Good times.

    [​IMG]
    [​IMG]
  8. DirtyDog

    DirtyDog Omnia mea mecum porto

    Joined:
    Apr 27, 2007
    Oddometer:
    9,485
    Location:
    Tulsa... it's OK
    Did some maintenance tonight, including the forks.

    I find it odd that nobody in the web (that I could find) would outright state how much volume of fork oil to add. Really? For a stock fork?

    A bunch of crap about measuring, pumping the damper rod, measuring again, adding or removing fluid to arrive at a measurement of 100-140mm air space.

    Doing all this shit, I came up with about 490mL of 10wt added to a stock fork with 120mm to the top of the tube (spring removed, tubes compressed).
    Only about 350mL of grey sludge came out of the fork.

    In the process, I fabricated a simple helper tool. In the disassembly video I watched, the guy had particular trouble compressing the spring to fit a spanner wrench in there to take the cap off the damper rod. This solved the issue. Compress the spring a bit and slide this under the nut to make it accessible. Just a simple piece of steel plate with a notch cut in it.
    [​IMG]
    [​IMG]
  9. DirtyDog

    DirtyDog Omnia mea mecum porto

    Joined:
    Apr 27, 2007
    Oddometer:
    9,485
    Location:
    Tulsa... it's OK
    Raced the Crosstimbers National Enduro yesterday in OKC.

    Muddy at times. Finished 6th place in C+30. It was fun.
    [​IMG]

    Last year we had 3" of rain the day before the race. I rode it on my KLR.:evil
    [​IMG]
  10. AtomicGeo

    AtomicGeo Yep, ranked 49th.

    Joined:
    Jul 6, 2007
    Oddometer:
    5,029
    Location:
    Los Alamos, Northern NM
    ^^^ How did you keep your KLR adv sticker clean? :D
  11. De250r

    De250r Adventurer

    Joined:
    Apr 27, 2011
    Oddometer:
    76
    [​IMG]
    My new kdx hybrid


    Sent from the back woods of vt via patchy Internet
    Live free and ride hard
  12. fastdadio

    fastdadio Still gettin faster

    Joined:
    Sep 18, 2009
    Oddometer:
    3,649
    Location:
    Pinckney Mi.
    :evil:evil Tell us more about it. :wink::wink:
  13. De250r

    De250r Adventurer

    Joined:
    Apr 27, 2011
    Oddometer:
    76
    It's an 84 kdx200 motor in a 2005kx250f chassis. It went together very well. It's very light. I can't wait to ride it. A couple odds and ends to do still. My buddy had an older Kdx and I loved that bike. That motor in this chassis will be a bullet proof trail missile.


    Sent from the back woods of vt via patchy Internet
    Live free and ride hard
  14. GearHd6

    GearHd6 Been here awhile

    Joined:
    Aug 2, 2009
    Oddometer:
    264
    Location:
    Ashford, CT
    Hey everyone. I'm thinking of going to look at a 98 KDX220 that is about a 3-4 hour ride from my house. The bike is currently street registered in his state so I'm figuring I should be able to register it in my state easy enough. I'm wondering how these bikes are for street use, what can I expect for gas mileage per tank? I know it will be a pain to do premix on the road but I'm sure I'd get the hang of it. Are there any problem areas to look for on these bikes that aren't obvious to the naked eye? Any other info you can offer up would be great.
  15. DirtyDog

    DirtyDog Omnia mea mecum porto

    Joined:
    Apr 27, 2007
    Oddometer:
    9,485
    Location:
    Tulsa... it's OK
    I've never met anyone who regretted owning a KDX.

    I use mine for highly limited DS duty. Some things to consider:

    1. I get something in the range of 60-70 miles on a stock tank at 50:1

    2. I use non-DOT knobby tires and the ride on slab is horrid at highway speeds. If you have rim locks, try balancing the rim and buy DOT tires.

    3. The only lingering issue with the KDX motor is apparent piston failure. Go to kdxrider.net to read about them. Most riders do a preventative piston swap.

    4. There is no oil filter. Extended trips on a high-strung offroad bike will probably not be wise.

    If all you're doing is connecting trails, riding county/forest roads, and limited pavement, it will probably suit you.
  16. fastdadio

    fastdadio Still gettin faster

    Joined:
    Sep 18, 2009
    Oddometer:
    3,649
    Location:
    Pinckney Mi.
    Lack of cush hub is hard on the tranny, and the vibes will burn your ass at hwy speeds. :lol3:rofl:lol3:freaky
  17. Scribe

    Scribe £Bob£

    Joined:
    Nov 8, 2004
    Oddometer:
    10,399
    Location:
    In my natural state
    Mine won't really do highway speeds. It's pretty topped out at about 60. What an awesome bike, though. It will climb trees if you want it to. That and the fact that its cheap to own and operate make it a keeper for me. I gotta fix the excessive spooge thing, however. Probably a tuning issue
  18. GearHd6

    GearHd6 Been here awhile

    Joined:
    Aug 2, 2009
    Oddometer:
    264
    Location:
    Ashford, CT
    Thanks for the information guys. I really don't think I'll be hitting the highways with it, it'll be used mainly on back roads and secondary roads. I'd say the speeds would be kept down around 45 mph or so. I'm still on the fence about buying it. I'm wondering what the headache of mixing the gas on the go will be. Are you guys carrying oil with you when you go on trips? Is it a powervalve engine that is sensitive to only synthetic oil like my powervalve snowmobile engine is?
  19. DirtyDog

    DirtyDog Omnia mea mecum porto

    Joined:
    Apr 27, 2007
    Oddometer:
    9,485
    Location:
    Tulsa... it's OK
    Think of it as the KLR of the 2-stroke world.

    Reliable, easy to maintain, and fun to have. Sure, there are better, more exotic and modern bikes out there.

    Carrying a qt of Lucas premix (or your fave) and a measuring container isn't that big of a deal to me. You probably won't be stringing together that many tanks of gas in one day...
  20. kbob999

    kbob999 Red Rider

    Joined:
    Mar 14, 2010
    Oddometer:
    147
    Location:
    Parker, CO
    You can put a 16 tooth front sprocket on (largest that fits), which really increases your top speed, and with the low rpm torque makes the trails manageable. You can run 45mph w/o punishing the engine.
    As for mixing gas - carry a pint bottle of ester based oil with marks for every gallon at 40:1. When you fill up, dump the amount of oil based on the amount of gas. A pint does about 4 gallons. I get 45-50 MPG on trails/road mix so this gives me 300-350 mile range...way more than I can handle in a day.
    We just did a 2 day 350 mile ride with 2 KDX 200 & 1 KTM 200 and all ran this combo w/o any problems.
    BTW - the KDX is bulletproof and a great value for the cost of purchase and operation. Keep the bearings and chain lubed, and they last for decades!