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Doesnt Hondaman on sohc.net do a electronic ignition for the 500/550 that incorporates the original points?
QuoteDoesnt Hondaman on sohc.net do a electronic ignition for the 500/550 that incorporates the original points?Yes and so does mine. Let's call his and mine a transistor ignition module to destinguish it from a full electronic unit. An advantage over the fancy expensive stuff is that, if anything goes wrong, the old situation can be restored within minutes. Mine has worked reliably for over 60.000kms with the same contactbreakers. I also like where my module is located, in a box attached to the battery (see pic) and not in a hot (condense) and vibrating place. If you make your own, make sure to use supple wire. My wires got hard and one came loose (after 15 years) when I removed the battery for winter storage. BTW, I advice first to have your project running with the oldstyle ignition before you throw money at it and then, when you're satisfied with the bike, you can consider going electronic which has some advantages like a better idle and somewhat more response in the high rpms. But do not expect even one HP more.
Contrary to all of what you hear I never had to re-time it or adjust / change the points in 20k miles, all I did was lubricate the felt on the points plate regularly.
As far as I know, and I'm open to correction, the same unit fits all the early inline 4's. I'm using the Boyer unit on my CB350F.Interestingly the Boyer system fires all 4 plugs together.You also need to make sure the ignition coils have a primary resistance of at least 4 ohms.
The spec sheet shows a lowest primary resistance of >5 ohms
QuoteThe spec sheet shows a lowest primary resistance of >5 ohms Strange, are you sure?