I was wondering which piston would be the best for me. 08 yz 450 mrd exhaust, otherwise stock, except tuning and i ride mosty motocross tracks and like to freeride.(no trails) I was looking at wiseco, je, cp ,. riding around 5,000 ft, dont need more power but could use it, does high compression make better low end? does h.c. piston last as long, looking for something durable, also is there any drawbacks to using a high compression piston. first thumper rebuild since 2 stroke, needed this because carbon deposits caused valves to not seat and could not start the bike. any info on any of this is greatly apreciated, thanks.