How do you change a spark plug on a 06 Suzuki ltz400?

To change the spark plug on a 2006 Suzuki LTZ400, first ensure the engine is cool and disconnect the spark plug cap. Use a spark plug socket and ratchet to remove the old spark plug by turning it counterclockwise. Carefully install the new spark plug by hand to avoid cross-threading, then tighten it securely but not excessively. Finally, reattach the spark plug cap, and you're done.