In this schematic the "Retainer" is used most often.
Parts such as the Gear Shifting: Lever Assy,gear Shift, Cam,gear Shift, Stopper,gear Shift Arm, Pawl,gear Shift No.1 are included in the Rm250z 2004 (k4) Usa (e03) Gear Shifting parts fiche.
The most expensive part in this assembly is the Cam,gear Shift.