This is great news. It took some research to come up with a solution. Thankfully, it was a cheap solution. I had all the bits to build it in my stash of connectors and components. If I get chance I will post the schematics for the device and get it made a sticky. As these bikes get older the electronics will start playing up. If you see a cheap ECU or dash on eBay then buy it and squirrel it away for a rainy day. Glad to have helped out. Pay it forward.
I think myself extremely fortunate and will certainly do my best to aid anyone where I can. It's been quite the crash course, and without the support of this forum (and special mention to ChrisW), I am confident that my Tacho would have never worked again!