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  1. JJs80XS

    Purpose of float needle plunger?

    Hi! Adjusting float height on my 1980 650 and I think you're supposed to measure float height from where the float tang touches--but doesn't compress--the little plunger on the float needle. This got me thinking, what is the purpose of this plunger? The internet and all my tech manuals seem to...
  2. JJs80XS

    Runs great on one cylinder, surges on two

    Hi xs650 geniuses, 1980 xs650SG. It's been surging randomly and also won't come down from high rpms. Something interesting I've noticed is that when I pull either the left or the right sparkplug cap and make the bike run on only one cylinder it will idle nicely without surging, and as soon as...
  3. JJs80XS

    Headlamp stopped working

    Hi! 1980 XS650SG. The headlamp has been working fine. Then the other day I unhooked the bulb from the 3-prong connector to do some other work behind the light. Forgot to turn off ignition switch, and somehow blew the headlamp fuse. The fuse REALLY blew. Like, all black and smoky. Put in a new...
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