In the mean time, I've gone and bought something else to race. It's the latest craze over this way with about a dozen blokes now racing them. And, it only costs about an extra 30 bucks per race meet to race the second bike.
It has a slight leak where one of the header pipes joins the motor (not sure if it needs a new gasket or not) and blows just a puff of white smoke when warmed up, but it was a bargain and looks good.

Not sure the missus is too happy with me having 4 bikes in the shed.