6 months isn't that long
It'll probably be fine.
It's good practice to drain the carbs and put some stabiliser in the tank but 6 months isn't really that long. I've seen bikes run fine after standing for over 12 months with fuel in the carbs. Just take a few precautions before you fire her up. I'd suggest you:
1 - Put as much fresh fuel into the tank as you can, to dilute the old stuff - if the tanks full consider draining it completely and putting all fresh fuel in.
2 - Make sure the battery is fully charged - (this might be your biggest problem).
3 - Put it into a high gear and turn the back wheel with the ignition off, to move the pistons a bit. Don't bother oiling the cylinders - they'll be fine after only 6 months.
4 - Pull the clutch lever in for about 30 seconds to free up the plates incase they stuck together.
5 - Make sure the brakes are ok - that the pistons haven't siezed.
Then press the button and see how she idles once warm - it'll probably take a couple of tries on the starter, and will take about 5 mins for for the fresh fuel to get through. If it idles ok I'd take it out for a short run and top the tank off, if it pulls ok through the rev range it should be fine.
If it coughs and splutters then it's time for a carb strip and clean.
