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My exposure to that era of Cali's was when I lived north of Kansas City. First thing Ace Mallot and the St. Joe Guzzi gang would do with a new bike was replace the stock exhaust with big open pipes with turnout ends. They were a little loud but they would really run. They had the car burglar alarms going off all over St. Joseph, Mo.
You sure Ace needed a bike to set off alarms?