leak down?/compression test?

[panhauling]

does anyone know what the leak down range or compression should be on 4 stroke motorcycles such as kxf450, or a honda 450

[SonnyLynnVick75]

i did a leak down on my bike before and for some reason the number is 8 comes to mind i believe that may be the amount that can leak out with out having to rebuild the bike