Bought a NEW 2012 ST 1300 in July 2016. From the first tank it has been getting 25 to 27 miles to the gallon. Now has 3400 miles and Honda won't help me with finding the cause. Dealer agrees there is an issue but no obvious signs of where the problem may originate and Honda won't authorize time to trouble shoot. Have a 2007 ST with 75,000 miles on it that ALWAYS got 37 to 39 MPG round town/freeway and up to 42 highway on cross country trips. Thermostat is good, not throwing any codes, not running rich. Any help would be appreciated. Stonewalled by Honda corp "customer service" dept. While agreeing MPG is not normal they say without a "symptom" being identified they consider the bike to be performing "as designed". My contention, the MPG is the symptom. Basically I have to tell them what is causing it before they will determine if it is covered under warranty.