What ignition system do I have?

[Bob_]

Hi, I have a 1981 cb750c DOHC which has been having ignition issues. I spoke with Murray from Murray's Carbs who recommended an accel kit if I wanted to spend a bit of money so I bought one and received the 14403 kit with 3 ohm coils. On the box however, in bold letters it states (NON-CDI). Everything I have been trying to research seems to indicate that the electric ignition (no points) and the OKI MPS-200 boxes under my seat indicate that I have CDI ignition, but another site, https://www.denniskirk.com/accel/super-coil-kit-140403.p20309.prd/20309.sku which list the same kit says that I can test the coils resistance to find out which ignition system I have. I tested the coils on the bike, one looks original other looks replaced, both AW82-TRI, and both had 2.6 Ohm resistance which according to the DennisKirk site means that they are Inductive, not CDI.

The Clymer manual for 79-82 dohc's also calls the ignition system CDI, yet many forums claim that it is not "True" CDI and I am now more confused than ever, and unsure if this 14403 kit will work, or if I need the 14404 0.7 ohm coil kit.

 

[KevinGlover]

Bob can you pull off the left side cover and see if you just have two black boxes (CDI) or a set of points spinning around? I thought the CDI was the physical unit that's housed under the left side cover. I know you know more about this stuff than I do so sorry if it's not helpful.

 

[user8086]

That bike consists of this..2 ignition coils,2 spark units,a capacitor discharge ignition (CDI)unit,and four spark plugs.

 

[KevinGlover]

That bike consists of this..2 ignition coils,2 spark units,a capacitor discharge ignition (CDI)unit,and four spark plugs.

Do you know what the spark units actually do? Are they kind of like a relay? I haven’t been able to figure it out.

 

[user8086]

It's a fully transistorized ignition system this solid state system unlike conventional ignition systems, does not use breaker points, when the race portion on the crankshaft driven rotor isis one of the cylinder pulser generator, a pulse is generated within the pickup coil this pulse (electrical current) flows to the switching and distributing circuits in the spark units.