[Stinged]

https://sampwiki.blast.hk/wiki/OnPlayerEnterVehicle
https://sampwiki.blast.hk/wiki/GetVehicleModel

Код:

public OnPlayerEnterVehicle(playerid, vehicleid, ispassenger)
{
    if (GetVehicleModel(vehicleid) == 425 && GetPlayerScore(playerid) < 800)
    {
        ClearAnimations(playerid);
    }
    return 1;
}

EDIT: @Flake. You shouldn't use !=, because then it will only work if the player has exactly that amount of score.