I went to look at an '09 ninja 250 for/with my friend. The owner said it had been sitting awhile, so I know there could possibly be problems with the battery, carbs, hoses, etc. in the near future. But, the bike started up fairly well for how long he said it had been sitting. It idled below 1000 rpm's and almost died until we put the choke up and then it revved up to around 4k, and eventually 5-6k. Then my friend asked me to test drive it, but when I shifted it into gear and pulled the throttle it died. I started it up again, and just revved it in neutral. If I jerked it slightly and rapidly it would give me some action, but if I pulled and held it as if I was starting from a stop it would sound bogged and die. I just want to know if this is a carb problem or just bad gas from sitting so long. I wouldn't wanna have to clean the carbs, but if I can get away with just cleaning out the tank I'd be happy. Thanks.