Replacement coil

[AndyD]

Hi,
Got the 1979 GS1000S fully back together and started / ran really well first push on the starter - much to my surprise!
However when I rolled her outside a few days later to fire her up again to run and balance carbs / set timing etc. she only ran on 2 cylinders.
Swapped coil wires over and the other two then fire so looks like a dodgy coil.
I have got a spare set of coils from a GSX1100EZ (GS1100E) and wondered if those could be used or are much different?
If not OK, has anyone had any experience of the Hitachi replacement coils I see available on quite a few sources?

Cheers,
Andy

[Steve]

Check the resistance of the 1100 coil. Your 1000S has points in the ignition system (unless you have upgraded), and they require coils with slightly more resistance. I believe your coils were specified in the 4-6Ω range, the 1100 calls for coils in the 3-5Ω range.

.