The 2020 Harley-Davidson Street Glide Special is one of Harley’s most venerable touring motorcycles. The bike is highway-ready, but it’s also happy to cruise the boulevards and city streets. The Special is an upgrade over the standard Street Glide. The Street Glide Special has the Milwaukee-Eight 114 engine. It’s an air-cooled V-twin that has a displacement of 1,868cc. The 114 engine is mated to a six-speed manual transmission