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Old 09-06-2012, 09:56 AM   #40
R100RT Mark
Gnarly Adventurer
Joined: Feb 2011
Location: Georgia, USA
Oddometer: 310
Originally Posted by disston View Post
I suppose that would work. Not a lot of space there but you might make something like this work.

But I have never heard of anybody doing something like this on an Airhead.

Ordinarily a dual point ignition does something different. It makes the points last longer and work better at higher RPM. They do this by have one set of points handle the function of closing and the other set of points handle the function of opening. Mallory still makes V8 distributors that have dual points. Had them on a pair of Ford 427 motors in a boat a few years ago.
Not sure what's being said here but British twins typically use/used two sets of points. Later BSAs used 12v coils and independent systems giving a long dwell time for the coils to energize. Some Triumphs used 6v coils in series with a wasted spark meaning that each cylinder could be timed independently but both would fire each revolution.
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