How can i make my Space Ship with BodyThrust Stop???

So i made a space ship, which uses a script to find the Throttle of a Vehicle Seat...anyway i put a Part called "Engine", with a BodyThrust inside of it. So it works fine but, i cannot get it to stop, even if i anchor/unanchor the Ship, here is the script...How i can i fix it to make it stop when the throttle hits Zero???

Seat = script.Parent.VehicleSeat
Engine = script.Parent.Engine

script.Parent.VehicleSeat.Changed:connect(function()
	if script.Parent.VehicleSeat.Throttle == 1 then
		script.Parent.Engine.BodyThrust.Force = Vector3.new(0,0,-9999110.09)--The Ship is really big so i need lots of Force to even move
	end
end)

script.Parent.VehicleSeat.Changed:connect(function() --This is the function where it should be stopping.
	if script.Parent.VehicleSeat.Throttle == 0 then 
		script.Parent.Engine.BodyThrust.Force = Vector3.new(0,0,0)--So how can i make the ship stop moving?
	end
end)

script.Parent.VehicleSeat.Changed:connect(function()
	if script.Parent.VehicleSeat.Throttle == -1 then
		script.Parent.Engine.BodyThrust.Force = Vector3.new(0,0,9999110.09)--The Ship is really big so i need lots of Force to even move
	end
end)

Try this:

Seat = script.Parent.VehicleSeat
Engine = script.Parent.Engine
BrakeSpeed = 10 --Change this to brake faster/slower
MoveSpeed = 9999110.09 --The Ship is really big so it needs lots of Force to even move

if not Engine:FindFirstChild("BodyVelocity") then
	BodyVelocity = Instance.new("BodyVelocity", Engine)
	BodyVelocity.MaxForce = Vector3.new(0, 0, 0)
	BodyVelocity.Velocity = Vector3.new(0,0,0)
else
	BodyVelocity = Engine:FindFirstChild("BodyVelocity")
end

script.Parent.VehicleSeat.Changed:connect(function()
	if script.Parent.VehicleSeat.Throttle == 1 then
		BodyVelocity.MaxForce = Vector3.new(0, 0, 0)
		Engine.BodyThrust.Force = Vector3.new(0, 0, -MoveSpeed)
	elseif script.Parent.VehicleSeat.Throttle == 0 then 
		BodyVelocity.MaxForce = Vector3.new(BrakeSpeed, BrakeSpeed, BrakeSpeed)
		Engine.BodyThrust.Force = Vector3.new(0,0,0)
	elseif script.Parent.VehicleSeat.Throttle == -1 then
		BodyVelocity.MaxForce = Vector3.new(0, 0, 0)
		Engine.BodyThrust.Force = Vector3.new(0, 0, MoveSpeed)
	end
end)