Love that shirt!!!
Way back in the Dark Ages of the 1970's, my buds and I all rode Honda 70's, 100's, 125's etc. they were all point ignition and you could always tell when the points were closing up: chop the throttle for a turn and be rewarded with a helluva backfire. It was known as 'shooting crows'. That meant it was time to pull over to the side of the trail and set the point gap with a matchbook cover.