A motorized standup utility vehicle having a removeable seat post assembly. The removeable seat post assembly is substantially cylindrical and has an “S” curvature shape and consists of a top post assembly and a bottom post assembly. The removeable seat post assembly has a pivotable seat on one end and male pin on the other end configured to removably attach to a receiving channel of a seat frame of the utility vehicle. The removable seat post assembly can be configured in a sitting position and a standing position to support the back of a rider.

A motorized standup utility vehicle having a golf bag mounting system to mount a golf bag. The golf bag mounting system enables the golf bag to swivel in multiple positions (left, right, center) and rotate and tilt between a range of 90 degrees (vertical) to 30 degrees (horizontal) positions. The golf bag mounting system comprises an upper bag support assembly, a lower bag support assembly, a swivel mounting plate, a cradle bracket, a bushing plate and a cylindrical tube which are all connected by connecting bolts. Further bungee cords are used to secure a golf bag to the golf bag mounting system.