xs400 running rich on one side

  1. F

    Stutttering over 4K revs

    Hi After seemingly getting this 1980 XS400 running well, its now struggling to get over 4000 rpm under load but will rev cleanly on the stand. It starts easily and ticks over beautifully, in riding it accelerates nicely up to the 4K point after which it starts to stutter and miss. Plugs...
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