i had a look at hartwell mcc, and their categorisation of 600cc is either novice or non expert instead of superstock or supersport. are the bikes superstock or mix? and why there is no expert class? http://www.hartwellmcc.org/results.htm i checked preston mcc aswell. they are more extreme. under 500 or over 500 http://www.prestonmcc.com.au/results.htm who hold/where can i actually find superstock races? like club, vic, national level? Cheers!