PROBLEM TO BE SOLVED: To improve a brake system simulator device for a motorcycle.SOLUTION: A simulator device 10 includes a housing 12, and at least one first displaceable member 14 displaceable with respect to the housing 12 against the spring force of the spring mechanism 16 of the simulator device 10 from a start position. The simulator device 10 can be coupled with the brake master cylinder 50 and/or the brake operation element 18 of a brake system so as to transmit a braking force 20 to the first displaceable member 14. The first displaceable member 14 is displaceable from the start position to a locking position by the transmitted braking force 20, and the simulator device 10 can be further coupled so as to transfer the braking force 20 to at least one wheel brake mechanism 26 from the time when the first displaceable member 14 is at the locking position.
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