The Gen 2 coil has no marking as to '+' or '-'. The Gen 1 does.Tom, Which has What?The Gen 1 and Gen 2 coils are different, that we know.
The Gen 2 coil has no marking as to '+' or '-'. The Gen 2 does.
Both coils have a wide tab and a skinny tab. On the Gen 2 the skinny tab is connected to the black wire that goes to the igniter.
Now, it seems obvious and a dumb question, but I have to check.
In the Gen 1 harness is the skinny connector connected to the black wire that goes to the CDI? In other words, is the '-' side of the coil connected to the CDI?
I should think they would be wired the same buuut....
On a Gen 1 ignition coil the inward skinny tab is the Black/Yellow Ground terminal. Primary contact tabs face towards the rear of the bike.
I do believe polarity does make some difference on both systems. Not sure how much difference.
It would seem, then, that on the Gen 2 the fat tab is B+ and the skinny tab is connected to the black wire from the igniter.
On the Gen 1 the fat tab is connected to the black wire from the CDI box while the skinny tab is connected to chassis ground.
Whether important or not I'm going to try very hard to install the coils with the 'polarity' as originally designed. After all, if i get it wrong I may offset the gains that I achieve by indexing the spark plug (VBG).