Hi Raf, and welcome to the clan. Glad you finally made it through the initiation procedure and got logged on. (I'm sure the fiddly registration process is due to anti spam software to try and weed out the folks who want to fill your computer with junk)
Brisbane, eh? Do your bikes happen to look a bit like this?
If so, congrats on the purchase and we'd love to see some more photos of the pair.
Some further details of the mechanical make-up of the pair would be good to help us steer you in (hopefully) the right direction.
Also would be interested in why the bike has had work done on the motor, unless the previous owner was just a genuine petrol-head