I was wondering what all needs to be done when changing compression ratios. I have an 05 CRF250R and it has the 12.5:1 piston in it now and i want to put something like a 12.8:1 or 12.9:1 in. What else should I do to accommodate the change or is just leaving it at 12.5:1 the smartest thing to do? I race competitively and want the extra power but don't want to have to worry about blowing the motor up. Any and all help would be much appreciated.