ZN1300 Injection to Carbs Conversion.

Hi Guys.
I have a 1986 ZN1300 where I have removed the fuel injection and fitted carbs however there is a problem with the Igniter as it gets some information from the Injection computer and will not run above idle.
It starts instantly but wont go above a fast idle.
I have changed to a 2nd set of carbs from a running Z1300 but get the same result.
I have also changed out the igniter with the correct part number unit but get the same result.
Using a timing light the timing advance goes to full on as soon as any throttle is used.
If anyone out there has done this conversion on a ZN1300 or a ZG1300, how did you get around the wiring or igniter issue?
Cheers
Denis