1) If its the oem, at its current age of about 5 yrs it won't go much longer BUT
if it cranks well enough you can probably get by for this summer.
2) Theoretically, that 8V measurement is too low BUT a lot depends on how you did it.
There are very short, very low voltages present (but only for a very brief period) when many motors are cranked by reasonably good batteries. But if you just hook a load tester or some other device to a battery that in effect time averages what you see on the meter due to the slow response of the meter you miss them. So if you got the 8V with a typical VOM or a load tester, its telling you that battery is on the way out.
So where are you going and do you mind begging a jump if you need one?
Do you carry jumper cables that you know how to use?
You might get a chance to test both if you keep using that battery.
FWIW, I'm still using the oem in my 08 and it looks good for another year- but I do trips with a riding partner and carry jumpers (that so far have only been used to start someone else's bike). I also have a Battery Bug on mine which makes it easy to watch for approaching battery death EXCEPT some of the oem gels seem to suffer a "sudden death syndrome", and crap out with no warning at all.