NX250 Thread -- official ADV owners manual

Discussion in 'Thumpers' started by valvecrusher, Mar 17, 2008.

  1. valvecrusher

    valvecrusher tractus pro pensio™

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    THANK YOU!
    I miss riding my NX.

    TNTmo, if you WANT this, PM me...i don't want to bid ya up


    That mostly reflects a CDI issue, and since you are getting the 'no spark'...it's almost certainly the CDI..


    The issue described early in the thread, showing the 'tach jumping'...
    it's NOT the tach jumping when you turn the key from 'off' to 'on'....it's when you have it turned to 'on', and you hit the start button...

    while the engine is turning over, if you have a good CDI, you will see the tach needle pulsing while the engine trys to start.
    if the engine is turning over, but the tach needle remains motionless...the CDI is BAD...

    Simply turning the keyswitch from 'off' to 'on' will make the tach jump(usually), even if the CDI is bad..





    The CDI test isn't simply turning the keyswitch, it is more 'monitoring the tach' while trying to start the engine..
  2. valvecrusher

    valvecrusher tractus pro pensio™

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    that being said,


    it's odd that you say....'it's fine until the fan comes on'.....

    in my experience, the Fan only runs during 90F days, sitting in traffic....95% of the time, simply riding keeps the engine cool enough that the fan DOES NOT RUN.

    IF the fan running causes the engine to stall....(check wiring for a cross, or grounded wires, something crossed from fan control to engine ground?)



    change the thermoswitch for the fan control....
  3. tntmo

    tntmo Been here awhile

    Joined:
    Jan 31, 2012
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    535
    Location:
    San Diego, CA
    Go for it. I found a young lady who is interested in my NX, so it will probably be sold soon. I have a spare engine, seat, CDi and a few other parts that will be listed if it sells.
  4. Orkodelamuerte

    Orkodelamuerte Adventurer

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    Oddometer:
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    Argentina, Cordoba
    Haha... ok, I´ll try that one, Thanks for the explanations... sounds logical now...

    Thanks for your concern... This is exactly what happened:

    After having the whole engine rebuilt; I noticed that the fan was kicking in; and even though I WAS sitting in traffic, it was a surprise to me since I saw it in action only once since i bought the bike. Moreover, it kicked in like 2 or 3 times in a 10 mile city ride. Also, in that hot condition; the no-spark-condition began. Ever since, I would not be able to go over 5k revs for a long period; since when gaining heat, the no-spark bastard would kick in...

    Ever since I changed the spark plug for the OEM one, the heat condition disappeared completely, and the fan is back to sleep. I can feel it in my legs too :D .. (that happened 2 days ago..). Apparently, the OEM plug has a higher resistance so it dissipates the heat more efficiently. Still, the no-spark thing remains.

    I´ve just bought a new Ignition Coil, and I borrowed a working CDI from my mechanic, so as soon as I get off from work I´ll see what happens...

    PD: How that small-bike-spark-plug ended up in my bike will always be a mistery..:huh
  5. IheartmyNx

    IheartmyNx Ihave2draft

    Joined:
    Apr 10, 2009
    Oddometer:
    3,859
    Location:
    Nashville TN, no chit, police state.
    TN, VC, if either of you hasn't got one yet PM me...

    Mine is just sitting taking up space until I can build it (my parts bike)...

    Either one of you, or any ADV member needs it just PM... I'll stick it in a box send it to ya...
    I don't need any all-seeing-eye for it.

    One will come back around when the time for it comes.
  6. Jacl-Kampuchea

    Jacl-Kampuchea Booze Merchant

    Joined:
    Sep 27, 2010
    Oddometer:
    756
    Location:
    I see Drunk People.
    Oh, my bike sounds sweet now:)

    New: Camchain, valves, shims, oil seals, gaskets - all OEM.

    Good as new starter clutch bits, many.

    Deglazed cylinder, decoked piston - plus it was discovered the oil pump was only being held in place by one bolt.

    Now, it sounds tight as hell:clap
  7. Orkodelamuerte

    Orkodelamuerte Adventurer

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    Argentina, Cordoba
    :clap:clap:clap:clap:clap:clap:clap:clap:clap

    It's so good when things turn right! Good way to start 2013!
  8. Local Machine

    Local Machine Adventurer

    Joined:
    Mar 23, 2011
    Oddometer:
    74
    Location:
    Globe Trotter
    many folks around here dont know that the original NX OEM spark plug is plenty different from the standard issue NGK catalog plug.
    The original plug is semi-threaded, with a tight fit on the aluminum head and the electrodes look much different too.
    Code:
    http://www.wemoto.com/bikes/Honda/AX-1_NX_250_J_K_R_R3_import/89-94/picture/Spark_Plug_NGK/
    http://japan.webike.net/products/1956177.html
    They may have the same part # but there not the same. With the OEM plug the engine runs much smoother and the temp is kept on a lower level as well.
    Just sayin
  9. Orkodelamuerte

    Orkodelamuerte Adventurer

    Joined:
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    Oddometer:
    80
    Location:
    Argentina, Cordoba
    After replacing the CDI, ignition coil, spark-plug, and some faith, it finally seems to be working fine. Got home last night from work, installed all that and voilá!

    When for a 30mile ride and nothing but perfection occurred, I love my bike again, so now I´m into making it look pretty again.

    I must say I almost went suicidal last night.. I was like in the middle of nowhere. when suddenly the engine started to fail.. I said Sh*t, not again!!

    I pulled over, long-face mode, and I just let my mind sink under useless thoughts... Tried to start the engine, unsuccessfully. Don´t ask me why, I turned the fuel knob to reserve, hit the ignition and Brrroooooom!!!! Back to life!

    I have a dirty fuel tank!!!

    Gotta be honest, I almost cried..
  10. legends117

    legends117 Adventurer

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    Location:
    Beaches of South Walton, FLA
    I may be interested in the seat - depending on color and condition. The seat on the NX I just purchased is more slippery than a banana peel, so I am trying to figure out the best alternative. Let me know if you decide to sell. Thanks - JD
  11. Jacl-Kampuchea

    Jacl-Kampuchea Booze Merchant

    Joined:
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    Oddometer:
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    I see Drunk People.
    I'd just get yours re-covered.

    All the stock seat cover on these bikes seem a bit shit, to be honest. I had mine re-covered and that annoying strap removed for under $5.
  12. legends117

    legends117 Adventurer

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    Beaches of South Walton, FLA
    Yea - that's an option...but that means I have to find a place to do it, and take the seat in...and wait...
  13. Claytonroy

    Claytonroy Been here awhile

    Joined:
    Jan 25, 2006
    Oddometer:
    288
    Location:
    Oregon
    Anybody have a spare Front wheel?

    Actually, I need just the rim...the 19" 36 hole D.I.D. branded stocker.

    Looking to find one in very good shape....PM me with a price

    :ear

    Also I've got an extra stock cush drive/ sprocket carrier...if anybody needs one hit me up.
  14. fiep

    fiep Long timer

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    1,909
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    GA
    anyone interested in a plug and play solution
    for a better front end? :clap

    I have an XR250 front end that will perfectly fit
    incl tripples, forks, axle, 21" wheel
    maybe even the brake assy, as the NX line will be too short
    actually I also have a 17" drum rear wheel too many
  15. RebelYell

    RebelYell Been here awhile

    Joined:
    Jan 2, 2012
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    522
    Location:
    somerset nj
    What do you want for that 17 rim and brake assembly?
  16. Honda Scoot

    Honda Scoot My First Gold Chain

    Joined:
    Sep 24, 2008
    Oddometer:
    408
    Location:
    Sebring Ohio
    We saw this bike chained to a tree in the infield of Mid Ohio Raceway while attending the Super Bike Races.

    [​IMG]

    A week later we purchased it for the daughters to learn to ride. On the ride home I low sided and rag dolled it into the woods at 70 MPH. It was decided that we would get an NX125 for the children.

    Being impressed with the performance of the stock machine, I set out to create a back roads bike to save wear and tear on the larger road bikes. Wheel, Tire, and Suspension upgrades would be required for the remote roads traveled.

    [​IMG]

    Most of the mods were taken from the inmates of ADV Rider. Thanks To All :clap

    This is the bike that I needed / wanted and was built to meet my requirements. It was a work in progress for several years and now my favorite bike that I have owned over the last 32 years of adult riding.

    [​IMG]

    [​IMG]

    A 21" front wheel was laced to an NX250 Front Hub with Buchanan KHON906SH Spoke Set

    NX125 fender for the 21" front tire - fits the NX250 forks and gators perfect
    NX125 fork brace married to a modded NX250 Brace

    [​IMG]

    1" PVC spacer (1 1/16" diameter) and Stainless Steel washer on top of the stock front springs

    20wt fork oil for 200LB rider

    17" Rear Wheel, XL250R from 1986
    SV650 rear shock (99 to 03 [yellow] is the1st gen and has a higher spring rate) full length (not redrilled / shortened) = bolt on

    MT21 tires have good road manners and can travel creek bed roads and sandy bottom water crossings.
    80/90-21" front and 120/90-17" rear = same weight as the stock Trail Wing tires (19" & 16") so unsprung weight is kept low for performance.

    [​IMG]

    3" Kick Stand Extention, 5/8" OD steel tube x 4" long - 1/2" inserted per end and welded both ends - see photo below

    46 Tooth Rear Sprocket, climbs trees in 1st and redlines 6th gear at 84 mph per GPS = 7.8% ratio increase from the stock sprockets and tires

    Open up the top of the air box

    [​IMG]

    Open the bottom of the exhaust can and screen it as a spark arrestor

    [​IMG]

    Filed down the inside header welds = 6% increase in area

    [​IMG]

    Main jet to 145 from stock 138
    Shim Main Jet Needle by 0.056" with a washer

    [​IMG]

    Turn out the idle mixture screw to suite

    XR100 1987 Foot Pegs = bolt on using the NX250 pin and springs

    [​IMG]

    XR250R 1984/1985 Spring loaded Shifter = bolt on

    [​IMG]

    EBC OS6001 280mm Oversized Rotor comes with relocation bracket = bolt on

    [​IMG]

    EBC MXS185 Brake Pads = bolt on

    Blazer 55w Fog Light, Auto Zone, Use washers as spacers to mount to cowling hardware
    Blazer 113db car horn, Auto Zone, needs bell sawn for flush mounting

    [​IMG]

    32" wide handle bars with carbon fibre look
    Hand Guards with carbon fibre look and aluminum support molded inside - levers remain full length
    Handle Bar Risers, Rocky Mountain ATV

    [​IMG]

    Garmin with RAM mount on left - TomTom mount and Power Port on right

    [​IMG]

    Roto-Pax aux. fuel cell with custom mount

    [​IMG]
    [​IMG]
    [​IMG]

    90 degree in line fuel filter - Mud and dirt can fall into the tank as the Roto-Pax gets dirty

    [​IMG]

    Wolfman Mini Beta Max Tail Bag with custom mounting plate adaptor to stock rack for overnight rides

    [​IMG]
    [​IMG]
    [​IMG]

    Edit"
    The skid plate and crash bars are from scrambler66.

    [​IMG]

    Mounted the aux lights to the crash bars. https://www.superbrightleds.com/moreinfo/mini-auxiliary-lights/10w-mini-aux,-2-modular-led-off-road-work-light/1699/
  17. valvecrusher

    valvecrusher tractus pro pensio™

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    Nice work HondaScoot!

    I'll link up THIS post to the front page index, if you don't mind...

    then you won't have to repeat/repost for each time someone asks you to list you mods..
  18. fiep

    fiep Long timer

    Joined:
    Mar 9, 2005
    Oddometer:
    1,909
    Location:
    GA
    not trying to sell that wheel,
    want to find out if someone is interested in the whole set-up
    the 21" front end will raise the bike quite some,
    even if you lower the tripples a bit,
    the 17" rear will help getting everything back in balance
  19. thirstybuck

    thirstybuck Adventurer

    Joined:
    Jun 14, 2011
    Oddometer:
    82
    Location:
    USA
    Scoot - great bike! I hope we can ride together this spring/summer.
  20. Dirtstar1

    Dirtstar1 Human torpedo

    Joined:
    Dec 9, 2010
    Oddometer:
    121
    Location:
    Almost mexico I.B.
    Work sent me to the desert to tune on a race car. So I took the nx250 and the mt250. Two of my favorite bikes of all time. It would be impossible to choose the best bike, but my girlfriend will say the elsinore 250.

    <a href="http://s29.photobucket.com/albums/c285/dirtstar1/?action=view&current=CA77DD73-30E4-4BFF-B5D3-CB193414D0E4-8300-00000B60A53D1EE7.jpg" target="_blank"><img src="http://i29.photobucket.com/albums/c285/dirtstar1/CA77DD73-30E4-4BFF-B5D3-CB193414D0E4-8300-00000B60A53D1EE7.jpg" border="0" alt="Photobucket Pictures, Images and Photos" /></a>

    <a href="http://s29.photobucket.com/albums/c285/dirtstar1/?action=view&current=10FA74D8-8EF7-4CFE-A042-3575424DC93A-8300-00000B60AB296F53.jpg" target="_blank"><img src="http://i29.photobucket.com/albums/c285/dirtstar1/10FA74D8-8EF7-4CFE-A042-3575424DC93A-8300-00000B60AB296F53.jpg" border="0" alt="Photobucket Pictures, Images and Photos" /></a>
    <a href="http://s29.photobucket.com/albums/c285/dirtstar1/?action=view&current=63293E71-543D-452E-B8F3-FE90351FD042-8300-00000B609CC648E2.jpg" target="_blank"><img src="http://i29.photobucket.com/albums/c285/dirtstar1/63293E71-543D-452E-B8F3-FE90351FD042-8300-00000B609CC648E2.jpg" border="0" alt="Photobucket Pictures, Images and Photos" /></a>
    When the race car broke we spent the rest of the day exploring some really pretty desert.