I'm new to this cite and am currently interested in buying the new 2013 kx250f for local racing. the only problem I am facing is that the bike comes with a 13.8 compression piston and we don't have race gas in my country. does anybody know if you can run pump gas in it at sea level? if not would it work just downsizing the piston to a 12.5 - 13.0? any input/ advice would be greatly appreciated!!!