Building A XR650l Engine

Discussion in 'Thumpers' started by mcma111, Aug 6, 2011.

  1. beechum1

    beechum1 Grimace Soup

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    he's indisposed at the moment. Could be back in the garage in a week or two. Or three.
  2. TanasiRob

    TanasiRob Squid Emeritus

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    nevermind--- I figured it out.... :D
  3. mcma111

    mcma111 Long timer

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    I finally have the CW mill together with the exception of having the cam degree'd in.

    [​IMG]

    I took most of the innards from my original motor and build a back up motor. Bead blasted the cases and painted them Dupli-Color engine ceramic engine paint. Honed the cylinder and re-ringed the Wiseco 102.4mm piston, CW balanced the crank, NX650 second gear, Mega Cycle cam and rockers, stainless fasteners.

    [​IMG]
  4. techforlife

    techforlife CDI REPAIR

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    Purdy........i like em..:D...now stuff it in and see what she does,,we want video:1drink

    B
  5. joexr

    joexr Banned

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    That Harley looks like it could use some TLC and elbow grease.:cry
  6. techforlife

    techforlife CDI REPAIR

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    You offering,i`m sure Steve would love ta have you over to shine his ride,,,and drink his beer...:wink:


    B
  7. Spud Rider

    Spud Rider Long timer

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    I love the big fin cylinder head. :thumb

    Spud :beer
  8. katbeanz

    katbeanz earthbound misfit, I

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    Nice work Steve! :clap
  9. JSeward

    JSeward Adventurer

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    Hi all

    Been following this thread for about a year and completely rebuilt my 1988 nx650 engine using the tips tricks and wealth of knowledge where, utterly brilliant and I have learnt heaps.

    So, about two weeks ago some arsehole stole my complete engine, brand new excel wheels with tkc80s and the swingarm, totally gutted, but I am determined to finish my custom nx650 project, which leads me to my question.

    Will the XR 650 engine fit in the nx650 frame ?? I am looking for a new engine.
  10. mcma111

    mcma111 Long timer

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    A XR650L engine is the same as the NX engine except for the transmission gearing. I don't think a XR650R engine will fit.
  11. JSeward

    JSeward Adventurer

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    Many thanks Steve, opens up a few more options at least, the domi isn't easy to come by in NZ

    Cheers
    J
  12. Aaron from Texas

    Aaron from Texas Been here awhile

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    Wow... good stuff.
  13. JSeward

    JSeward Adventurer

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    Hi

    Does anyone know if a 1995 domi engine will fit in a 1988 frame ??

    Cheers
    J
  14. mcma111

    mcma111 Long timer

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    They are all the same.
  15. JSeward

    JSeward Adventurer

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    Thanks yet again steve:clap
  16. JSeward

    JSeward Adventurer

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    Hi Steve

    I have replaced the nx650 oem shock with a hagon which doesn't have a threaded bolt at the base. Would you think I Need a special bolt or would any old mild steel bolt do?

    Cheers
    J
  17. mcma111

    mcma111 Long timer

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    I would use a grade five or even better a grade eight shouldered bolt and a thin self locking nut.
  18. Grayjet

    Grayjet Ride on!

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    Just an idea: Maybe you could you use the stock bolt if you thread the new shock with a tap. I was surprised how easy this was to do the first time I did it. This depends on the size of the new mount hole compared to the stock bolt, of course.

  19. JSeward

    JSeward Adventurer

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    Thanks both. The new shock is a slightly larger diameter that the old threaded version. Grade eight bolt it is then!

    Thanks again guys
    J
  20. Tough Luck

    Tough Luck Adventurer

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    First of all - nice work on the motor rebuild.

    I found it helpful in my own rebuild. As I was tearing down my motor, I noticed what appeared to be black 'paint chips' in the oil pump screen. I noticed the cam chain guides have a coating on them. The 'paint chips' I found was this coating falling off the guides. So, I ordered replacements, which aren't cheap. When they came in, the coating was already coming off the new OEM parts as well.

    Has anyone else seen this?