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Boyer ignition?
Posted: Wed Sep 09, 2015 9:26 am
by equipo5
Does this look like the pre 79 BMW Boyer ignition to you?
Removed link.
These are probally 30 - 40 yrs old but seem to working ok.
Anyone know any good sites on how to adjust timing and measure dwell with these?
Thanks and cheers
Ian
Re: Boyer ignition?
Posted: Wed Sep 09, 2015 10:00 am
by Duane Ausherman
Can't see them as a scam for a fake Windows repair comes up. Now I have to scan my computer to be sure.
Re: Boyer ignition?
Posted: Wed Sep 09, 2015 10:38 am
by equipo5
Removed link. Just googled "photobucket Virus" and there are lots of warnings which I was not aware of before. Sorry about that.
My computer scan came up virus free.
Hope yours is OK.
Cheers
Re: Boyer ignition?
Posted: Wed Sep 09, 2015 5:49 pm
by chasbmw
Boyer ignitions should be timed on the F mark. Don't worry about the actual revs, just set the Boyer on the F mark when the Boyer stops advancing. Ignore the S mark, especially if your Boyer is a Microdigital.
Older Boyers like a healthy battery, they revert to full advance if the voltage drops below about 9-10 volts, later models have fixed this.
Hope this helps
Re: Boyer ignition?
Posted: Thu Sep 10, 2015 7:48 am
by SteveD
equipo5...if'n you're in town tomorrow I have the day off and nuthin' planned. We could fiddle with it!
Re: Boyer ignition?
Posted: Thu Sep 10, 2015 8:20 am
by Nourish
No I think you ought to get on with the ignition!!!
Re: Boyer ignition?
Posted: Fri Sep 11, 2015 4:59 am
by equipo5
What, the F..... and forget about the S. Thanks for the tip Charles.
Just saw your post Steve, would have been a welcome break from gardening duties today.
Damn.
Cheers
Re: Boyer ignition?
Posted: Sat Sep 12, 2015 4:34 am
by SteveD
Well, we fiddled with it a wee bit today, but not the timing. Flushed the tank, added Karcoma taps and new fuel lines then reset the float heights. Both needed a tweak, the left more than the right.
That seemed to help as the bike started and ran better after re tuning the carbs. Then we went for a ride to a local brewery. The bike ran fine and didn't get any more tweaks!
And it was a nice warm day with blue skies an' all!
