Honda XR350R

Discussion in 'Thumpers' started by MZcountryboy, Nov 23, 2007.

  1. Zahnarzt

    Zahnarzt Crashes Much

    Joined:
    Sep 10, 2009
    Oddometer:
    1,159
    Location:
    Mid Missouri - Clearing Brush and pickin' ticks
    Ugh, You are right of course.

    I told him in no uncertain terms that it would never be a "cherry" bike.
    But, I'm at least going to try. The kid is going to "help" with the build, so even if it isn't 100%, I'd rather him be learning in the garage than out drinking or the other stuff teenager do.
    plugeye likes this.
  2. plugeye

    plugeye MC rescue

    Joined:
    May 11, 2007
    Oddometer:
    7,250
    Location:
    Garland, Texas USA
    well, the time spent IS worthwhile. good on ya, doin your part
  3. Todd157k

    Todd157k Long timer Supporter

    Joined:
    Aug 14, 2012
    Oddometer:
    3,737
    Location:
    Ventura, CA
    It aint THAT bad.. hahaha. I think it's do-able as long as you're not going to wire up lights. Minimal wiring, cleaning up the carbies, and fresh gas/oil.. (plastics come up on ebay frequently). As for the case cracks.. I'd go with JB weld. Chances are the kid isn't going to ride it that much to really put effort into it. If he does, he'd probably get a better bike.
    On the downside.. the dual carb models were a pita to get working correctly.
  4. Zahnarzt

    Zahnarzt Crashes Much

    Joined:
    Sep 10, 2009
    Oddometer:
    1,159
    Location:
    Mid Missouri - Clearing Brush and pickin' ticks

    +1 on the no lights..

    I grew up with a TT600 and then an XT600. Dual carbs are not fun, but I have a good understanding of how they work (in theory).

    Ill know more about the extent of the case crack on WED. The kid is doing all the scut work which includes cleaning it from top to bottom and everything in between.

    To be honest though, If it wasn't a Honda I wouldn't even try.

    I have some small bits from an '84 XR250R I scrapped. Do these use the same frame and airbox?:hmmmmm
  5. Zahnarzt

    Zahnarzt Crashes Much

    Joined:
    Sep 10, 2009
    Oddometer:
    1,159
    Location:
    Mid Missouri - Clearing Brush and pickin' ticks
    Well... sometimes you win, sometimes you do, absolutely not win.

    I cleaned the xr up a bit and started doing basic checks.

    Plug - broken.
    Carb caked and dirty
    Compression - zero
    Valves - ex were ok, intake were about 1 mm.
    Well shoot.

    Bore scope in the nostrils with no cam installed

    2019-06-26-20-44-49.jpg

    Yep, no good is coming of this.

    Pull the head.

    20190626_205936.jpg


    And the piece DE resistance...

    20190626_210153.jpg

    Stripped cylinder threads

    Oh and only one centering dowl was present.



    Man I really hate what people do to bikes. Add in the 1/2 pound of rtv removal and I called it a night.
  6. Todd157k

    Todd157k Long timer Supporter

    Joined:
    Aug 14, 2012
    Oddometer:
    3,737
    Location:
    Ventura, CA
    Unbelievable!! And whats really unbelievable.. it probably RAN that way! gotta love those old hondas.
  7. Zahnarzt

    Zahnarzt Crashes Much

    Joined:
    Sep 10, 2009
    Oddometer:
    1,159
    Location:
    Mid Missouri - Clearing Brush and pickin' ticks

    He said it would run if they "Pull Started" it.

    The stupid thing is.... I want to get it running now. Just to spite the previous guy who tore it up.
    But, a quick look at RockyMountain shows that few if any parts are available from the OEM.
  8. Todd157k

    Todd157k Long timer Supporter

    Joined:
    Aug 14, 2012
    Oddometer:
    3,737
    Location:
    Ventura, CA
    My brother is restoring his old XR500 (dual shocks). He found most of the engine parts but some he had to buy used off evilbay. The one thing he couldn't find in good condition was the cam chain guide.. which is plastic and crumbles when they get old. Stupid thing like that and you're screwed. Nice thing is, with 3D printing, you can have one made albeit expensive.
  9. Zahnarzt

    Zahnarzt Crashes Much

    Joined:
    Sep 10, 2009
    Oddometer:
    1,159
    Location:
    Mid Missouri - Clearing Brush and pickin' ticks
    Would anyone have a service manual they could check the valve spring free length for this bike.

    The springs were installed upside down - tight coil up.

    But I'm thinking the springs are toast due to them all being different lengths...


    How would a 3D printed polymer hold up in this heat range? (I have zero knowledge of the material)
  10. Todd157k

    Todd157k Long timer Supporter

    Joined:
    Aug 14, 2012
    Oddometer:
    3,737
    Location:
    Ventura, CA
    I doubt a polymer would, but they have a bunch of different materials for the printers.
  11. BadCaptain

    BadCaptain Bad decisions make good stories

    Joined:
    Mar 11, 2019
    Oddometer:
    234
    Location:
    Cowford, Fl
    Somewhat new here, but longtime '85 350R owner. Recently broke the countershaft at the kickstarter drive gear. Ended up acquiring an entire '85 bottom end to resuscitate my vintage bike. Should anyone here be in need of bottom end parts for their '85, let me know.
  12. enduro16

    enduro16 Long timer

    Joined:
    May 15, 2012
    Oddometer:
    1,751
    Location:
    The woods of northern IL.
    20210504_145320.jpg 20210504_145309.jpg 20210504_150242.jpg
    kenny61, Todd157k and Bultaco206 like this.
  13. enduro16

    enduro16 Long timer

    Joined:
    May 15, 2012
    Oddometer:
    1,751
    Location:
    The woods of northern IL.
  14. enduro16

    enduro16 Long timer

    Joined:
    May 15, 2012
    Oddometer:
    1,751
    Location:
    The woods of northern IL.
    Old school cool...

    20210520_183031.jpg 20210520_183045.jpg 20210520_183745.jpg 20210520_194320.jpg
    Bultaco206 likes this.
  15. BadCaptain

    BadCaptain Bad decisions make good stories

    Joined:
    Mar 11, 2019
    Oddometer:
    234
    Location:
    Cowford, Fl
    20210505_150253.jpg 20210505_124448.jpg
    Stretch67 and enduro16 like this.
  16. enduro16

    enduro16 Long timer

    Joined:
    May 15, 2012
    Oddometer:
    1,751
    Location:
    The woods of northern IL.
    Just like living in paradise, I don't ever want to go home...

    20210619_200840.jpg 20210618_201611.jpg 20210618_193807.jpg 20210618_193522.jpg
    Stretch67 and Bultaco206 like this.
  17. enduro16

    enduro16 Long timer

    Joined:
    May 15, 2012
    Oddometer:
    1,751
    Location:
    The woods of northern IL.
    Good Times
    20210827_160553.jpg 20210827_160607.jpg
    Stretch67 and Bultaco206 like this.
  18. BadCaptain

    BadCaptain Bad decisions make good stories

    Joined:
    Mar 11, 2019
    Oddometer:
    234
    Location:
    Cowford, Fl
    Very nice! Here's my '85

    P1010058.JPG
    Stretch67 likes this.
  19. enduro16

    enduro16 Long timer

    Joined:
    May 15, 2012
    Oddometer:
    1,751
    Location:
    The woods of northern IL.
    I don't know if I'm happy, I don't know if I'm sad, but she's gone...

    20210912_191304.jpg 20210913_191659.jpg