Any Honda Dominator NX650 owners out there ?

Discussion in 'Thumpers' started by KeithDommirider, Jul 31, 2007.

  1. Pablo83

    Pablo83 Sleep, Wrench, Ride

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    I can't imagine what about that carb would prevent the engine from exceeding 3000 rpm unless you're whacking it open too quickly.

    I guess a massively undersized (or clogged) main jet could cause that. If the choke is stuck open, maybe that could cause it too.
  2. Play it Loud

    Play it Loud Adventurer

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    Pablo, carb was thoroughly cleaned and full functioning before being put in bike.

    I'll let you know he results of tweaking carb over the weekend.
  3. gman79au

    gman79au Been here awhile

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    make sure your valve clearances are correct and ign system isn't failing at the 3000rpm mark, a timing light with a HT lead pick up can show this while running the bike
  4. HeadTrauma

    HeadTrauma ¯\_(ツ)_/¯

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    I haven't, but letting us know what jets and needle position are being used will give clues as to whether your problem is in the carb or elsewhere.

    Yup, just a big, simple round-slide carb with choke butterfly instead of an enricher valve.
  5. Pablo83

    Pablo83 Sleep, Wrench, Ride

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    That's a great looking bike, BTW. I'd love to hear more about it. My guess is you're running the XRR forks. What about the rear?
  6. Play it Loud

    Play it Loud Adventurer

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    Were at the same offroad site again next Tuesday, so I will take more detailed photos.

    The bike uses all the XR600R running gear, frame, seat, acerbis tank, plastics etc. the Dominator motor, front fairing, loom, front mudguard, carb. Custom battery box under rear mudguard

    So what do you get if cross and XR600R, Dominator, Hearse and an H&K MP5:huh ............... you get an XRinator!

    The original XR was swapped for a hearse bought for £100, the dominator was also purchased for £100, the Acerbis tank was swapped for a H&K MP5 (repilca):evil . Bar that it was a pretty straight forward build.:wink:
  7. jj5

    jj5 Been here awhile

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    Sounds good. Got any building pictures?
  8. Pablo83

    Pablo83 Sleep, Wrench, Ride

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    General information on worldwide model year changes to the NX650

    Originally posted by Switch on www.xrv.org.uk

    CHARACTERISTICS OF EACH "GENERATION" (specifications similar to previous years, unless specifically mentioned as a change):

    1. 1st generation / version 1 (also made for US) - 1988

    RD02 designation
    type 1 fairing + seat
    turn signals external from fairings
    golden rims
    square-base end cans with golden caps
    long carb 'neck' (intake manifold)
    13L fuel tank
    Nissin front (disk) brakes
    drum rear brakes
    front sprocket countershaft with 7 teeth
    kick-starter
    'short' pro-link rear shock
    rectifier mounter on the back of the airbox
    fuse box with 3 fuses + 1 or 2 diodes (unsure where they switched over - perhaps the one with a single diode doesn't have a sidestand cutoff switch?)

    2. 1st generation / version 2 (european) - 1988 -> 1989

    disk rear brakes (Nissin)

    3. 1st generation / version 3 - 1990 - 1991

    removed kickstarter (can still be added with some work)
    front sprocket countershaft with 14 teeth

    4. 2nd generation / version 1 - 1992 -> 1994

    type 2 fairing + seat
    removed possibility of adding kickstarter (modified engine block)
    turn signals integrated into front fairings
    turn relay now has 3 terminals (extra terminal connected to ground)
    16L fuel tank w/3 mount points for each front fairing
    fuse box with 4 fuses and no diodes

    5. 2nd generation / version 2 - 1995

    RD08 designation (VIN starting with ZDCRD08...)
    front right footpeg mounting changed
    round end-cans with silver caps
    short intake manifold
    "long" pro-link rear shock (actually frame mount 1 inch higher)
    redesigned airbox (same air filter though)
    repositioned rectifier from rear of airbox to under the luggage rack (also longer wires on rectifier)

    6. 3rd generation / version 1 - 1996 - 1997(some)

    type 3 fairing (seat compatible with type 2)
    silver rims
    turn signals external from fairings
    16L fuel tank w/2 mount points for each front fairing and slightly offset bottom mounts

    7. 3rd generation / version 2 - 1997 -> 2003

    Brembo brakes



    EXTRA THINGS THAT WERE CHANGED:

    ALL YEARS: seat height - the claimed seat height varies wildly between 82cm and 89cm; I don't have exact info
    ALL YEARS: Honda tuned the carb settings a LOT, based on year and country of export; main jets vary from 140 to 160 (all valid stock sizes). Idle jet is 50-55 all the time, I believe. Air screw settings are a mess.
    LATE YEARS: Honda apparently messed with the camshaft or valvetrain; the is a POSSIBILITY that newer than 1997 bikes need 0.10mm of exhaust valve lash instead of the 'standard' 0.12mm; this is UNCONFIRMED
    LATE YEARS: somewhere along the way, the crank sensor was changed from single-pickup single-sensor to a multi-pickup single sensor setup; result is that new and old ignitions don't quite match; bike might run but will show wrong RPM; use at your own risk or ask beforehand
    EARLY YEARS: it's unclear to me what Honda did to the rear shock mount on early models; I've seen three frames (91, 90, 96) that have different rear shock mount height, measured directly against the lower lip of the headstock



    Things NOT related solely to production year:
    parking lock (locked handlebar with position lights on) -- this is specific to Austria, I believe
    smog pump (externally mounted on the left side of the cylinder) -- no idea on specifics here - US California has it, but also some EU bikes
    luggage racks
    speedometer markings (km/h, mph) -- related to US/UK models, likely
    front headlight protector -- must've been an optional for 1st generation models, either OEM or aftermaket
    sidestand switch, either as a simple warning light or as an engine cutoff (1st generation only, but unsure of years/coutnry - later models include the full package: warning light + engine cutoff)
  9. jj5

    jj5 Been here awhile

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    great list.

    Never occurred to me the 1990+ had bigger tanks i thought it was a mistake in spec list of various websites :p oh well in return i have a kickstart
  10. Play it Loud

    Play it Loud Adventurer

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    [​IMG]
    [​IMG]
    [​IMG]

    Put the Dominator carb back on for now until the new jet and needle arrive for the XR carb.

    Unfortunately i have not got to drop the engine out again as shortly after these photos Phil flipped it and bent the gear selector shaft:lol3 :clap :cry
  11. Bluesmudge

    Bluesmudge Been here awhile

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    I have two pelican 1430's to attach to my hepco and becker rack.
  12. jj5

    jj5 Been here awhile

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    This is how its gonne be. 1 Givi topcase + a 50L softbag. In there i have a tent+mat+sleeping bag+ tools + clothes for a week and all kinds of other stuff you tend to take with you. Only hard bit is getting on there :evil

    Now other question i still have a anoying metal noise when my engine revs above 3000RPM under 3K you just dont hear it and it starts exactly at 3K rpm. The frequency of the sound goes up with the revs. Speed, gear and warm or cold engine have no influence. It only occurs above 3000rpm and its not the valves. Its a pretty loud metal DING DING DING DING noise. Im not sure if it actually comes from the engine or is caused by vibration but i cant find the source and it annoys me. anyone got clues what it might be? Oh and the weirdest part when you rev it in neutral you dont hear it!

    [​IMG]
  13. Pablo83

    Pablo83 Sleep, Wrench, Ride

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    Does it make the noise when it's in gear, but the clutch is pulled in?
  14. jj5

    jj5 Been here awhile

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    Dunno gone try that tomorrow. Would actually make sense if it was the cluch cos thats the area that makes the sound. Bike has 33K KM and the engine has never been opened so plates could be worn out. Good thing to check :)

    Btw the bike has some weird oil drinking habbits :D The bike got new oil and filter like 3 weeks ago checked oil level last week and it was still oke. Then i gunned it last week on a empty strip of highway and drove 130-150km/h (80-95mph) for a while. This weekend i had a tour ride so i checked oil again at first tank stop and to my horror it was below minimum! I filled it up again and rode another 300KM that day(50-80km/h touring) and regularly checked oil level but it didnt drink a singe drip. so i suspect it was the high speed riding i did last week. Can a 30min run with speeds of 120km/h+ use like half a liter of oil?
  15. McVick

    McVick Been here awhile

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    I found a Drip! :eek1

    Yes, a Drip on the garage floor just below the left front fork. :cry


    What say the experts? :ear

    Do you think it's a fork seal?
    Will I need to replace them?
    How do you do it?
    Should I consider replacing the springs and fork internals at the same time?

    Thanks.
  16. Pablo83

    Pablo83 Sleep, Wrench, Ride

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    If the fork is leaking, it needs new seals. It's a relatively easy job, but it helps to have a couple special tools: fork seal driver, and fork oil lever gauge. But I've done the job without either so it's not required. You'll certainly want a manual. Read through the procedure and let us know if you have any questions.

    If the fork oil has never been changed you are going to be real surprised at the color of the fluid and the amount of metal in it. The NX uses ATF (tranny fluid) for fork oil. Replace it with 10wt fork oil, it has a much longer life than ATF.
  17. PilbaraGoat

    PilbaraGoat Been here awhile

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    Last weekend I had a couple of Germans staying at my place. One was on an Africa twin with a 50 l tank. The other was on this dommie.

    Oil cooler
    Oil temp guage
    Custom 40l tank from www.enduro-manufaktur.ch
    and a whole bunch of stuff.
    Custom lowered seat
    I think she also had a lowering link.

    They were seriously loaded with gear. 8 months travelling around Australia.

    [​IMG]
  18. PilbaraGoat

    PilbaraGoat Been here awhile

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    If anyone is interested, here is the Africa Twin with it's 50l tank.

    [​IMG]

    We did a few repairs in my shed while they were here. And in return they spend hours trawling German Ebay for Dommie parts for me.....we bought the bits and hopefully they'll be here within a month. Can't wait to get the old girl all polished up again.
  19. jj5

    jj5 Been here awhile

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    yikes would hate to pick that AT up looks like he caries at least 100KG of luggage with him. :lol3 Cool looking bikes though!

    Btw had a look at the swiss website they dont mention the nx650 anywhere just the xr650 they told you if it was a costume made tank or had to do any changes?
  20. PilbaraGoat

    PilbaraGoat Been here awhile

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    Fully custom job! I think he started with a DR tank (or something else), then modified it. The front farings had to be trimmed and do still have some tension on them to spread wide enough.

    From memory it cost a hell of a lot. Might have been as much as 700 euros......but I can't quite remember.

    As far as weight goes....I agree it would be scary to drop either of them.

    An interesting bit of knowledge...
    The AT (watercooled) could maintain high speeds without overheating. The Dommie performed better at slow speeds. The dommie temperatures would climb into oil destroying temperatures (even with the oil cooler) at high speeds on hot days for extended periods of time.....with the oil temperature guage, they are able to slow down and keep temperatures perfect.

    Andre was telling me that the ideal situation is to have an oil cooler for slow speeds and water cooling for high speeds.....would this be true, or is it just the greater volume of oil due to having the oil cooler that helps.