u/AwesomeMikey09

I have a 2007 Suzuki v Strom 1000. Getting 27 mpg combined. I am led to believe this is far below where it should be. Tire pressure good, had two shops look at it. TPS was checked, valve clearance was done, new spark plugs, coolant sensor was changed. Where do I go from here? Fuel pressure regulator? Throttle body sync? Injectors? Give up and sell it? It also has lots up trouble starting when cold. PLEASE SOMONE KNOWLEDGEABLE HELP! I am new to gas motorcycles and this is becoming a bad first experience.