we have "solo seat"rego here(qld),about two thirds less cost,i ride mine every chance i get,so i get good value,i had a fully road regoed yammy it 250(thinly disquised yz)for ages in vic.the club rego would be different in every state,get proper rego,,youll enjoy the freedom.back in the day i did my "L"s on a yammy it 400 ,with 398cc filed off and 246cc stamped into the block,i was checked out once by cops and it went over their heads,the 398 was a raised cast and my feeble effort paid off.my heart was pounding at the time the cop crouched down and looked there.(learners had to have 250cc then)i got away with a barrel as big as a prise winning water melon.