ignition coil specs ??

I like how you said please . I cannot remember as it is several years ago. YOU can work it out. Look at the R1 wiring and find which colour is common to each coil. This will be the power side. The uncommon colour will be the trigger side. Do the same with your rocket coils. place power to power and trigger to trigger.
 
Can someone please explain what difference it would make having 2 coils with 0.9 ohms as apposed to 1 dual coil with 1.8 ohms????
 
Can someone please explain what difference it would make having 2 coils with 0.9 ohms as apposed to 1 dual coil with 1.8 ohms????

According to me the ecu is involved with sending its ignitionsignals to the coil.So the ecu is calculated on sending/receiving signals to/from 2 separate coils with each 0,9 ohms it won't be confused/damaged(.)but when the ecu has to deal with 1 coil and a higher ohm the ecu possibly can be confused or even damaged. My opinion also.
 
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Dunno but I have these on my 250hp R3R don't know what they are or where they came from.

Fairly certain that's a coil from a 2009-2014 Yamaha R1, a shared part with a few other bikes. Nominal resistance is 1.4 ohms on the primary and mid 9500 +/- 200 ohms on the secondary coil.

What I'm curious about, is how Nev wired them, parallel or series. I suspect they're a series wiring to raise resistance to 2.8 ohms, as, parallel would yield 0.7 ohms, a potentially dangerous situation for the ECU.
 
Good question and the answer I do not know.