Which bolt? The 12mm head bolt that goes in the center of the tensioner? They, under no circumstances, will NOT handle what Yamaha recommends. Period! Only bolts I EVER torque to spec are the head bolts, cam bolt, crank bolt, clutch nut, balance shaft nut, and balance shaft + oil pump drive gear nut. All other fasteners are M6 in diameter, and are easily felt when tightening.