Electronic Ignition Advance Curves

This is the graph from the link that was provided in the very first post, The graph was labeled boyer micro mkIII, so I mistook it for the boyer microdigital. The text above the graph states that the boyer which was tested was an analog version, which explains why the curves posted here were different. I assumed that the "MICRO" part of the label meant it was a microdigital boyer...

.... and since I have a microdigital on my bike, I wondered if it had that anti kick back retard feature in it's ignition... I'm 210lbs and if I don't bleed the carbs, my bike will kick back when I try to start it, and I really lay into the kickstart to make sure it won't kick back. I've seen guys stand on the side of their bike and kick it to start it... NOT a chance with my bike, It's a very stiff kick, so I wondered if I had the retard feature in the programming of my microdigital boyer.

Yeah, the Boyer nomenclature is a bit confusing at best.

Ken

Just to be clear, the Boyer I tested was an analog device, not the micro digital. I understand that it's an older unit (it's what I happen to have had lying around). Please refer to my results as merely a guide, not a reference - in the sense I haven't had the opportunity to test multiple versions of each, validate my test set up with a know standard, etc. However, I do think the information is representative of the respective ignitions.

-- David

The Boyer micro digital has had the V shaped idle stabilisation feature for many years now. The trick with Boyers is to always time on the full advance. That is where you see that the Boyer has stopped advancing, rather than any specified rev figure.