The Andy Griffith Show S04 E16 Barney's Sidecar

"Nip it in the bud!"

Barney buys an antique motorcycle in order to set a speed trap for speeding truckers on Highway 6. After Barney makes a complete nuisance of himself to all of Mayberry, Andy realizes that the answer may be to make the motorcycle more valuable to the town than to Barney.