Buell 2009 XB Series Service Manual page 288

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48. Install and connect battery. See
ANCE.
3-34 2009 XB Service: Engine
1.5 BATTERY MAINTEN-
After installing seat, pull upward on seat to be sure it is
locked in position. While riding, a loose seat can shift
causing loss of control, which could result in death or
serious injury. (00070b)
49. Install seat.