Will my ktm 400 exc go across country

Discussion in 'Thumpers' started by Iwishiwasamechanic, Mar 3, 2013.

  1. Iwishiwasamechanic

    Iwishiwasamechanic Adventurer

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    I have a 2006 ktm 400 exc, street legal. I plan on riding from ohio to the Grand Canyon . Is it gonna make it, will it break down a thousand times? Also I'm having a problem with backfire on deceleration, I have cleaned the carb replaced the silencer and done minor throttle adjustment. Other than that runs super strong will do 95 no problem cruises smooth at 70. Any help or input appreciated.
    #1
  2. buzybraza

    buzybraza Been here awhile

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    Post your question in thumpers.
    #2
  3. Peanuts

    Peanuts Long timer

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    Change the piston for a forged one if you intend to cruise at high revs. That is the most common failure I see.

    I doubt it will actually cruise at 70, but regardless of speed it is still worth doing.

    Consider fitting a Thumper Racing 453 or 473 kit, enhances the bike.
    #3
  4. Iwishiwasamechanic

    Iwishiwasamechanic Adventurer

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    Will my ktm 400 exc go across country
    I have a 2006 ktm 400 exc, street legal. I plan on riding from ohio to the Grand Canyon . Is it gonna make it, will it break down a thousand times? Also I'm having a problem with backfire on deceleration, I have cleaned the carb replaced the silencer and done minor throttle adjustment. Other than that runs super strong will do 95 no problem cruises smooth at 70. Any help or input appreciated.
    #4
  5. Kyler

    Kyler Confused Hack Nut

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    you don't tell us enough. Are you doing the TAT or slabbing it? If TAT, yup it will do fine. Slab? Fugetaboutit
    #5
  6. tHEtREV

    tHEtREV Captain Awesome

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    Back fire on deceleration can be caused by air leaks in the exhaust, check all your joints for an airtight fit.

    And if your bike is well maintained, I'm guessing it would be ok to cross the country on it if you can keep up with the maintance on the trip.
    #6
  7. Iwishiwasamechanic

    Iwishiwasamechanic Adventurer

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    Kyler.. Uhh not exactly sure what that meant of hand . Tat(back roads) slabbing(highway) amiright?. If so ill be planning the trip on back roads. I'll have 50/50 tires maybe more street than that. An hour or two at a time riding . A lot of breaks.
    #7
  8. Iwishiwasamechanic

    Iwishiwasamechanic Adventurer

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    Thetrev. I sealed the exhaust manifold and still have the backfire.
    #8
  9. davesupreme

    davesupreme grand poobah

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    you need a bigger pilot jet.... and an adjustable fuel screw, and not an aluminum one that will break.... you probably have a 40 pilot, so try a 42...

    popping on de-accel means the pilot/low speed circuit is too lean, and you need to richen it.... if it gets too rich, it won't start when it gets hot, so you gotta get to that happy place.....
    #9
  10. Gundy

    Gundy Been here awhile

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    Make sure the AIS is removed if the bike has one. Also, jetting that is off can cause it.....too lean at low throttle openings will cause a lot of heat that can ignite excess fumes from richer needle and main jet settings. Try turning the fuel screw out a quarter turn and see what happens. Speeding up you idle a little bit might help to. My KLR had some really bad popping whe I went to an uncorked leo exhaust...turns out I had actually gone too rich on the main jet and needle, but was a little lean on the fuel screw.....it was giving me one really loud pop on decelaration.
    #10
  11. Iwishiwasamechanic

    Iwishiwasamechanic Adventurer

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    Grundy...thanks . I closed it then went out 2.5 made it a little better . I live in ohio the next warm day ill give it a full turn and see what happens.
    #11
  12. Kyler

    Kyler Confused Hack Nut

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    TAT = TransAmerican Trail. Lots of threads about that here, great ride. Back roads, good time. Slow.

    Slab = interstate/Highways. Fast, long, boring.

    Grab two BIG handfuls of Adventure and GO! You will never regret it.
    #12
  13. Iwishiwasamechanic

    Iwishiwasamechanic Adventurer

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    Thanks have never heard of the TAT definitely something I'm going to start researching . Not sure if you have done it but I plan on backpacking tent and a sleeping bag, ditches and woods, or even campgrounds how would that be on the trail?
    #13
  14. smj

    smj Been here awhile

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    Give a think or two about maintenance, and milage. You'll be doing some oil changes, and you don't want to run out of gas. Keep the chain well cared for, too, and watch your tires. Have a good means of carrying your gear, keep the bike tires down, and the rest is pure joy!
    #14
  15. effensteve

    effensteve Enjoying the ride

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    I think you should take a couple of trial weekends on the bike before you embark on such an awesome adventure. Traveling/ camping off of the bike is the only way to go in my book. But be prepared. :deal Read a few ride reports, spend a little time to find the route that suites your style best, but most of all, don't forget to pull the trigger and go. I sure wish I had started 20 years earlier when the obligations were less pressing. Have a great time!!
    #15
  16. biensur22

    biensur22 Been here awhile

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    You really shouldn't mess with the fuel screw until the bike is fully warmed up, take it for a 5-10min ride. Then start tweaking 1/4 turn at a time, giving it a few seconds to respond in between.

    You'll almost definitely have to go to a larger pilot jet.
    #16
  17. barnyard

    barnyard Verbal tactician Super Moderator

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    The key to making it is going to be how you ride it. If you ride it like you stole it, you will not make it to the Grand Canyon. If you take it easy on the revving, keep the air filter clean and plan for regular oil changes, you will not have a problem.

    I would get a couple of filter skins and use those to lengthen time between filter cleaning. I would check the oil and water levels every morning.
    #17
  18. effensteve

    effensteve Enjoying the ride

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    #18
  19. Pinchot Rider

    Pinchot Rider n00b

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    I ride my 500 EXC all over the PNW for days. No problems. Hitting the roads only to access fuel stops or convenience shops on the way. Plan your trip, camp sites, fuel and maintenance stops before you leave.
    Fuel will be your biggest issue as it was mine. Install bigger tank, extra rotopax gas and water can on back fender, I have a giant loop coyote bag for all my gear (Tent, bag, minimal clothes, spare tubes and some spare parts and of course some tools). I also have a gps mounted and always carry a Spot finder when out. On long trips I email my GPS route to friends and family. For long trips you need to plan a stop for maintenance, possibly an oil change etc. Most gas stations in the middle of the sticks will lend you a pan and some rags to drain your oil. Take it slow to keep fuel range up and also life of rear tire! still having a problem with that as bike is so fun.
    160 miles a day on my 500 EXC is max for me. With 4.5 gallons total can get 200 + miles if I go very easy.
    Be sure to get some short day trips on to adjust with gear on bike.
    Pack it up and go :clap
    Have fun, Nick
    #19
  20. crazybrit

    crazybrit Long timer

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    If you need to ask this question, especially in this way, it's most likely not the bike to take on this trip.

    Common problem, leaking exhaust flange header. Read this thread at ktmtalk (if you can't read it because you're not a member, then sign up).

    http://ktmtalk.com/index.php?act=ST&f=7&t=393949
    #20