Thats bad luck. They just don't like those red p-plates.
So how do you get the defects inspected? Is it just a pink slip inspection or carrington rta depot? A while back i was driving along foreshore and a cop on a bike pulled me over took my licence and told me to follow him to the carrington pits. I got done with excessive noise,no cam belt cover. So i just fitted a reducer tip from two and quarter to one and half. that done the trick.
I wouldn't be spewing about the twins. Look inside your carbs and see how big your ventures are. I had 48's and the ventures were 34mm but my bro had 45's and his were 38mm. What you have done to the ports will have a huge effect on the power. Along with the cam,valves,tuning etc..