Rocketfrog, if you are in Victoria have a look at the Viper website, a great club, good numbers and great tracks
Enthusiastic committee - well organised
They run modern classes which you would fit into and you will almost certainly find that nobody will complain about you running some of the other classes (even though/strictly speaking your bike might not comply) because so long as you are not at the pointy end and taking out those fabulous trophies everybody will understand you are just there for a good time, there are some really competitive riders but have not met a rule Nazi so far –
They even organise a crew to do the flagging/corner duty so you just pay your money and have a great day racing – look forward to seeing you there