I have a 2010 YZ 450 that I bought new, and race pretty much MX. I have around 35 hours on it and am going to do a new piston, rings, etc.. this off season. I checked valves at 30 hrs. and they were almost perfect. I run straight VP U4.4 w/ a full Yosh system and was wondering if there is any benefit to using a GYTR hi-comp piston, or the Cosworth hi-comp pistons are also very nice. Not sure if there is any performance benefit or should I just replace w/ stock? Not looking to do the GYTR cams, head, etc.. just curious if there is any benefit to doing the piston only? Thanks.