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Old 02-21-2013, 04:09 AM   #16
isdt BMW
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Joined: Mar 2010
Location: N. E. Ohio
Oddometer: 250
Have a Boyer on my R-75 ISDT bike, as the bike came without points or advancer, works great. Have a Dyna and dual plug on my R-100-S Motosport, with Accell amplifier and points, works great. Have standard points and advancer on my R-90/Hollendia sidecar conversion, works great. Never had any problem with any of them.
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Old 02-21-2013, 04:23 AM   #17
ME 109
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Location: Albury Australia
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Had my RS for 19 years.
I think it has oe electronic ignition.
Where would I look to find out?
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Old 02-21-2013, 05:56 AM   #18
disston
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Airhead electronic ignition starts with 1981 models. In 1981 all Airheads had electronic ignition.
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Old 02-21-2013, 06:01 AM   #19
chasbmw
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Quote:
Originally Posted by disston View Post
Airhead electronic ignition starts with 1981 models. In 1981 all Airheads had electronic ignition.
I disagree, no airheads had electronic ignition. BMW fitted the technology that Bosch had at the time, which was a hall sender switch to replace the points and retained the mechanical AR function the same as fitted to millions of volkswagens at the time.

This does not meet my definition of electronic!
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Old 02-21-2013, 06:27 AM   #20
disston
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I'll try to remember that Charles. Your definition is better. I'll agree with you.

So in 1981 BMW got rid of the ignition points.
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Old 02-21-2013, 06:44 AM   #21
Lornce
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Quote:
Originally Posted by chasbmw View Post
I'm pretty sure that Boyer have revised their ignitions, the problem was that under certain low voltage conditions, they reverted to full advance, which made starting difficult. I think that we are talking about under 10 volts for the early units.
Early Boyers didn't fire at all in a low voltage condition. Don't know if they've changed that design or not. I've been avoiding them for decades because of the feature.
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