why in your right mind would you want to piss that much money away on a N/A honda motor... but to each his own! the JE pistons are nice though, i believe it's 81mm on the bore of a gsr. Wiseco are another good piston maker, my friend has some on his crotch rocket 600(honda cbr or something like that i believe) and it's a bad ass bike for a 600! i would personally drop compression and run boost, but if you're hell bent on n/a, you need to at least match or exceed itr compression!