How can I make this boat have a max speed? I use a bodythrust

local Engine = script.Parent.Parent.Engine.BodyThrust --The Force making the boat move
local SForce = script.Parent.Parent.Steer.BodyAngularVelocity -- The force making the boat turn
local DSeat = script.Parent -- The driver seat
local Base = script.Parent.Parent.Base -- The base part of the boat
	 
speed = 5500 -- The force of 'Engine'
SteerSpeed = 80 -- The force of SForce
BaseDensity = .1 -- Lower this is your boat can't float, make it higher to make it go more in the water
 
DSeat.Changed:Connect(function(p)
	    if p == "ThrottleFloat"then
	        Engine.Force = Vector3.new(0,0,speed * DSeat.ThrottleFloat)
	    end
	    if p == "SteerFloat"then
	        SForce.AngularVelocity = Vector3.new(0,-SteerSpeed*DSeat.SteerFloat,0)
	    end
	end)
	 
	Base.CustomPhysicalProperties = PhysicalProperties.new(BaseDensity,0,0)

Try setting Engine.Force to Vector.new(0, 0, 0) if Base.Velocity.Magnitude is larger than some amount