Normal tears are secreted by the tear glands and then enter the pharynx through the tear dots, tear ducts, nasolacrimal ducts and other parts. When riding an electric bike, the cold wind stimulation will reflexively stimulate the tear secretion to increase beyond the amount of tear duct outflow, at which point tears will occur. You can wear glasses or helmet, blocking the cold wind stimulation, you can also do a proper local massage, plus some anti-inflammatory eye drops, will get some relief. This situation flushes the tear duct is open, there is no tear duct narrowing.