Provided is a home monitoring method and apparatus. A narrow stem comprises a plurality of holes running throughout the stem. The instruments are designed to engage with and disengage from spinal implants easily, and use of the instrument in spinal implant surgery can be carried out with minimal surgical intervention and does not require general anesthesia. A pair of doors is removably attached to the vehicle and each of the doors is pivotally coupled to one of a pair of side edges of the front fender. This arrangement enables a starter motor to be securely mounted to a power unit case with high rigidity, while enabling a reduction in the size of the internal combustion engine.