Run it
Copy the script and paste it into your executor.
loadstring([[
local player = game.Players.LocalPlayer
local function setSpeed(character)
local humanoid = character:WaitForChild("Humanoid")
humanoid.WalkSpeed = 75
end
if player.Character then
setSpeed(player.Character)
end
player.CharacterAdded:Connect(setSpeed)
]])()
yes

Universal