I like my 31 inch bars a lot
makes it easier to "man-handle" the machine .
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So , If ya drain the oil from a hot engine , then the drain plug cools while it's out . Then if ya put the cool steel plug [contracted] back into a warm aluminum motor ya screwed up . Aluminum hole is expanded from being warm , the cooled steel plug is back to room temp size and ya better not tighten them up together.
I know a guy who did that same thing with a warm aluminum head and a cool steel spark-plug who bought a new head after the plug warmed (expanded) it twisted in two instead of backing out. Aluminum changes more than steel anyway.