more uphill, a hand full more throttle, the wind was blowing in your face, If the plugs look fie, then you are getting a complete burn. Which then means that the engine is running normal, the carbs are set up correctly. You could be running poor gas.. I was getting about 20 MPG in my SUV consistently for 4 months, this month my MPG jumped up to 35. the only change in my driving habits this month, changed fuel stations.
The reason I am getting snide with you is because I am tired of hearing the same bs whining from you.. the bike's too small, its not powerful enough, and now... it sucks too much fuel... And when we give you advice, you just ignore it and start a whole new thread like this one on the exact same topic trying to get a different answer, which is insane.