Good on you for stopping to help , I ride a Harley as well as sportbikes , I don't gear up on the hog as much as I would if I was spending the day racing around the streets and highways . It is common practice , most cruiser types don't push it as hard when riding ,(generally enter corners slower or keep speeds about legal limit ,etc...) so you aren't as concerned about crashing and sliding down the pavement and a Black T-shirt is "good enough"
, on the sportbike I could do 100 in first gear and regularly saw speeds 2-3 times the legal limit even on regular rides , late brake into corners , wheelies , high speed passing etc.... , even with all the proper gear this is still dangerous , but dress for the crash . Problem with the black t-shirt mentality
is when you decide part way through
your easy sunday ride to hit the freeway or to chase a motard on a mountain pass , and things do awry , then you quickly realize the mistake you made as the road grates of your skin at .35 mm a second . I switched to a dot approved helmet last season , and no longer use those "skull" cap novelty ones , at first some of my Biker buds laughed and joked about it , but 4 have now switched over to the DOT ones since I explained I don't want my son to have to feed his dad soup for the rest of his life . They are all fathers too ......