Any Honda Dominator NX650 owners out there ?

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

  1. WoldM

    WoldM n00b

    Joined:
    May 30, 2012
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    Hi guys!

    So i just broke of the skew attaching one the exhaust pipes to the cylinder :baldy

    I'm guessing I'll have to open the engine to replace this.
    Is this the case?
    Also, are there any other things i can do if i have to open it? I'm thinking replacing gaskets and such.

    Cheers!


    [​IMG]
  2. WoldM

    WoldM n00b

    Joined:
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  3. Bounder

    Bounder ExternallyDisplaced

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    That will come out with a bit of care.
    You may need to drill it out with progressively larger drill bits then use some penetrating oil, acetone and ATF fluid is a good mix.
    Then try and gently remove it with an extractor, you may also need heat as well.
    If you aren't confident then ask a good engineer to remove it in place.
    Its a simple job with the potential to become a very big job.
  4. 2old2Bbold

    2old2Bbold was 2bold2getold

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    I'm guessing you mean the exhaust stud on the head. If there is any sticking out, try welding (have someone weld) a nut on the stud. Sometimes the heat will break it loose. If you have to drill it out, finding the center with the first hole is important. Go slow with larger drills and don't break off the tap. It is really hard and brittle. If all else fails, remove the head and take it to a machine shop that has an electric arc type stud/bolt remover. Worst case, drill out the stud, weld up the hole, drill and tap.
  5. 2old2Bbold

    2old2Bbold was 2bold2getold

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    Ooooh yeah. Remove the exhaust, screw a nut on the broken part. Have someone weld (stick, mig, tig) the center of the nut to the broken stud and while it's still hot unscrew the stud carefully. Works most of the time. This was a common problem on old air cooled VWs. They made a special stepped nut for a quick fix. You had to drill the hole in the exhaust flange bigger for the nut to reach through, but they saved a lot of heads.
  6. Bounder

    Bounder ExternallyDisplaced

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    Finally got the Brembo/320mm disc sorted. Hot as hell today for Ireland, around 29degs here in the shade.
    Brakes are strong compared to the Nissins I had before and very progressive feel.
    The Disc is the same as the XRL kit SM6010C but the bracket that comes with the kit doesn't fit the NX.
    Hose mounting is a bit shonky, none of the braided hoses I had were the right length or fittings, I had to use a NOS RMX 250 one that I had lying around which was a bit long.

    [​IMG]
  7. Skapegoat

    Skapegoat Adventurer

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    Nice work Bounder! :clap
    Sweat has been pumping off me while spannering in this heat!
    New chain and sprokets half on and I am dehydrated as hell.
  8. Bigbird

    Bigbird "Dog Is My Co-Pilot"

    Joined:
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    Haven't ridden much this summer, and last had my '88 NX out for a spin a couple of weeks ago. I was going to take it out the other day - after the rain stopped, finally - but it wouldn't start. I pulled the plug wire to check for a spark and nothing. It had been running just fine last time out, now, zero. I never use the kill switch, but the thought occured to me, could I have bumped it into the "off" positon? But when I look at it I'm not sure which is the "off" and which is "Run" !
    I believe the "Run" position is with the Run side depressed, Off side up.
    [​IMG]

    But if that is the case, then why no spark?
  9. Bounder

    Bounder ExternallyDisplaced

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    Have you checked the clutch cut-out?
    Is there a side stand cut-out?
    The switch is on the way you have it.
    Off is the top button depressed.
  10. Bigbird

    Bigbird "Dog Is My Co-Pilot"

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    No side stand cut-out - normally start it leaning on the side stand - and I normally pull in the Clutch when starting. BTW, lights, etc work ok.
  11. snowman318

    snowman318 Future Corpse

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    Mine is an '88, . It won't start unless it's in neutral, even with the clutch pulled.
  12. MartiniUp

    MartiniUp Long timer

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    Also there are TWO switches that need to be in the correct position. Along with the key turned on. And in Neutral.
  13. Skapegoat

    Skapegoat Adventurer

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    Check the clutch switch.
    There is a small unit beside the clutch with two connectors.
    Make sure both connectors are plugged in if so chase those two wires looking for a break.

    It should start in any gear with the clutch pulled in.
  14. dstriffler

    dstriffler Been here awhile

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  15. Bounder

    Bounder ExternallyDisplaced

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    Thats a super clean NX650, it looks almost showroom.
    Mine used to look a bit like that but the cases are a bit furry now.
  16. dstriffler

    dstriffler Been here awhile

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    My cases are messed up also. I was able to buy the left side brand new, but the right side is not available. I was thinking about replacing it with one from an XR650L, but I just really like the original color.
  17. Bounder

    Bounder ExternallyDisplaced

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    I'm not that worried about mine looking a bit worn, I've lost enough riding time this summer fitting the big brakes, anything else can wait till the winter.
  18. Honda Scoot

    Honda Scoot Time To Ride

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    Bounder,
    Any chance of a detailed procedure for the brake rotor upgrade?

    Edit: Perfect and Thank You!
  19. Bounder

    Bounder ExternallyDisplaced

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    Buy the EBC supermoto kit SMC6010C the C stands for contour which is a scalloped edge to the disc.
    It will come with a bracket BRK009 which is useless for the NX650 but will fit the XRL.
    Take off the old brake disc and fit the EBC one.
    I took off the fork legs and brought them into a local engineer with a lump of alloy plate and he made the bracket for me.
    I can take some dimensions but its probably easy enough for the local shop to measure it and make it up.
    I also changed the caliper from the stock Nissin to a Brembo from an SLR 650 which is a Euro model with the same engine and same brake setup as the NX.
    I don't know which models of bike were sold in the US with this setup.
    I know the later NTV650 Deauville has the same caliper as well but not sure about the mounts, if you are getting the bracket made up then it doesn't really matter that much.

    If you want to increase braking power without getting a bracket made up the SLR650 caliper and bracket are a direct bolt on fit to the NX650 and the 4 hole mount disc from an Africa twin XRV750 will fit directly without any modifications this will give you a 276mm disc as opposed to the 254mm stock.
    The Brembo master cylinder and caliper has much better feel than the Nissin unit.
  20. Honda Scoot

    Honda Scoot Time To Ride

    Joined:
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    Oddometer:
    548
    Location:
    Sebring Ohio
    I purchased a can of Rust-Oleum, 248637 Metallic Vintage Copper, for the Rothman project that has yet to really begin. http://www.rustoleum.com/en/product-catalog/consumer-brands/stops-rust/metallic

    It looked like the best color match that I have seen. A test panel was sprayed and it's not even close. Need try another color...

    [​IMG]

    VHT makes engine paints. Burnt Copper Metalic, SP402, might be a better match and is heat rated. http://www.vhtpaint.com/products/enginemetallic/