I also would first suspect the carb float. While you're dumping stuff in the tank, some Seafoam would be a good idea. It might just correct the sticking carb float, and it certainly won't hurt anything.

I run a tank of Seafoam treated gas after every oil change, just to help keep things clean. It's GOOD stuff.

 

Turn on the gas?

 

Could certainly be a stuck float, but check the simple stuff first. No insult intended, but we all make mistakes and the bike is new to you. Is the enricher disengaged?
Even if the **** is in, is the butterfly actually fully open?

 

Ok, I had the same problem as soon as I brought my bike out of hibernation for this warm spell. Rode all morning on it, and as soon as I cracked the throttle wide open and started running hard, it would barely idle, and all I could smell was gas. The only difference was, it was leaking gas out the overflow line. First of all, +1 on the seafoam, that stuff dissolves varnish and any kind of debris that might be messing with the float level. Do you know where the bike's overflow line is? If the float in the fuel bowl is sticking pretty bad, you'll have a puddle of gas under your bike. It might not be as bad as mine though, so I would try tapping on the fuel bowl and seeing if you can unstick the float. If that doesn't work, find that overflow line and spray carb cleaner into it, and then start the bike up and while you've got it running, spray carb cleaner into the carb vent and keep the bike running while you do it. If that doesn't work, you're gonna have to pull the fuel bowl off. Usually only 4 screws, but be careful, mine were blue loctited from the factory, and I ended up having to cut straight screwdriver slots in two of the screws to get them out. Once in the carb, push up on your float gently and then turn the gas on, see if it's leaking through or not. That little needle valve should keep any gas from getting through. While you're in the bowl, carb clean the hell out of everything before you put it back together. Hope you get it fixed. this weather won't hold. Good Luck!

 

Sounds like a sticking float in the carb.

Honestly, I would try throwing some carb cleaner in the fuel and running the bike for 40 or 50 miles on the highway. Vary your throttle position while you're running to help keep things moving in there.

I realize it isn't the *right* way to fix it, but it's cheap and easy. I've had pretty good luck with it, but it's not a magical cure-all. You will need to address why the float got sticky - I suspect there was at least one tank of gas that sat in the tank long enough to lay varnish on the fun parts.

 

Right on!

 

Definitely take it back to the dealer. That's the least they could do is to fix what they just sold you.....assuming they are honorable.