Double barrel questions.

Part I:
How can I remove the Oxygen(O2) sensor?

I've hooked three wrenches together to get around two
feet of leverage, and pulled such that they were
really bending ( these are Craftsman wrenches ).  I
sprayed oil on the 02 sensor to loosen it yesterday.
I'm hoping to get it off so I can solder back on the
lead wire that has been ripped off it.  Should I apply
some heat with a propane torch?

Part II:

Would an unconnected O2 sensor lead to backfiring and
trouble starting?  I'm guessing the O2 sensor measures
the oxygen in the exhaust and communicates that to the
computer which then gets the fuel injector to adjust
the mixture of air and fuel.

Part III: (Don't care if you answer, but I'm curious)
I've got an 84 Westy, I've noticed in the Bently they
refer to Digijet and Dijifant.  Is 83-85 = Digijet and
86-89 Digifant?

Thanks all,
Fenton & Jessey

84 Westy

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