Cheers - ended up ordering one anyway.
Hoped to get it tested last weekend, but didn't have the chance.

Thanks. It seems it's K-Line for the OBD on my bike. (I haven't got my bike here right now, but from what others have done.) There should be can bus between the ECU and the instruments, but that requires considerably more work than ordering from ebay and plugging it in. Guess that means I'm limited ...

I got one of these: https://www.amazon.co.uk/dp/B0098T6FZ8/ Which I'm using on my Sony Z2. It correctly reports the throttle and rpm; but only at 1hz. Any suggestions of others to use that will give me a few more a second? If need be, I'll shell out for the OBDLink LX/MX, but if there's others that ...