Stock specs was what I was initially going to do, but the cost difference is less than a couple hundred dollars for stock pistons vs high comp ones. It doesn't make sense to me, to go stock specs if the financial outlay is only about 10% more, unless of course the reliability suffers significantly.

I haven't been on the track in a few years and definitely couldn't utilise the power of the stock engine just yet, but every little bit helps when you're trying to keep up with the new bikes.