when given little gas.? I just bought a 2007 Honda Shadow Aero with 650 miles. During idle and deceleration the exhaust pops. Runs fine while idling and with throttle open. But dies in neutral and 1st when lightly accelerating. And hesitates a little in 2nd thru 5th. Was going to start by trying b-12 or sea foam but wanted to see if anyone had any other ideas.