Belt contacts the upper bolt boss on the front pulley cover. That's the squeak. Only happens when the suspension compresses down.
I would advise against anything sprayed on the belt as it will attract and hold dust/dirt... the enemy of the belt and pulleys.
110 Cubic Inches -- S&S stroker crank/Lloydz Big Bore, 11:1 Wiseco pistons, massaged stock
heads, Lloydz VM-1-HP cams, S&S valve springs & retainers, Torque Tubes intake, stock throttle
bodies, RPW Thor pipe, Lloydz ECU, PC-III, Rivera Pro clutch spring, 31 tooth pulley w/Buell belt.