1973 k2 Honda 500 carb problems (Sorted now, was coil wiring issue, not carbs)

[JamesH]

Nice one, well done Jon.

[Bryanj]

One of the boyer ignitions uses standard coils the other uses 6 volt coils in series(or 3 x 4 volt if its a triumph trident)giving extra wasted sparks. Its over 35 years since i fitted one so cant remember which is which

[jon stead]

This Boyer system uses two, 12volt, coils in series. The difference was unbelievable once I'd rewired them from parallel to series.

This morning, I put the "old", albeit overhauled carbs back on, and it fired up and sat happily idling on the first touch of the starter.

Edit:
Just rereading above, I guess two 6volt coils in series would give 12volt total?