HARLEY DAVIDSONS can shut down if they get too hot during a slow-moving parade or rally traffic. If the V-Twin engine gets too hot the bike’s electronic temperature system will shut down the engine. AMSOIL tested a V-TWIN for 1000 miles under low speed, low airflow, and stop-and-go conditions. There were no engine shutdowns or malfunctions during the test.  Tests concluded that Extreme heat is no match for AMSOIL V-TWIN Motorcycle Oil. A video showing these results of available at youtube.com/user/amsoilinc. Just enter “V-twin” in the search field.