Had a bike that smelled like that occasionally. One morning I woke up and just about pooped myself because my house smelled like gas. I have a gas furnace and water heater. Thank god my house didn't blow up. The petcock was failing, finally just quit and flooded the bike. Bike was under a year old. Gas puddle covered a quarter of my garage. That bike was carbed and I dont know the set up on the newer bikes. Hopefully it's not a faulty piece like I had. Good Luck.
I had something like that happen in the early 80's. Slept up stairs and used a box fan in the window to pull cooler air in and up from the lower level. My petcock failed and dumped the fuel on the garage floor. I was higher than a kite in the morning and crawled outside on my hands and knees. it took 2 days to get the gas smell out of the house.