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  1. Arrowrl206

    Piston Ring Replacement

    Hey where can I find rings for an '80xs400?
  2. Arrowrl206

    top end swap??? , xs360 and xs400 top ends

    Well I've got this book (binder really) with all the specs I could want. And from what I gather from it is the only difference between the engines is bore size (66.00-66.02 mm vs. 69.00-69.02 mm), piston oversizes (66.25, 66.50, 66.75, 67.00mm vs. 69.25, 69.50, 69.75, 70.00mm), camshaft intake...
  3. Arrowrl206

    top end swap??? , xs360 and xs400 top ends

    All very true. I was planning on purchasing a whole top end gasket kit regardless with the possibility of rings and pistols regardless of condition
  4. Arrowrl206

    top end swap??? , xs360 and xs400 top ends

    Well I have a 77 360 and an 82 400. Neither run. 360 has really low compression and the 400 I think has a head problem. Loud snapping sound happened every once in a while and only get exhaust out one pipe when turning it over with the electric start. So I thought I could just swap heads and get...
  5. Arrowrl206

    top end swap??? , xs360 and xs400 top ends

    So could I use a 360 head with a 400 cam?
  6. Arrowrl206

    History of the Yamaha XS400

    Thanks BBS360. really appreciate it.
  7. Arrowrl206

    History of the Yamaha XS400

    Can anybody help me ID this bike? 1L9-000723? I keep finding conflicting answers everywh
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