Bike license needed The Fun Just Got Bigger The BWs125 is powered by a peppy, reliable 125 cubic centimeters, four-stroke engine. Featuring a gas sipping fuel injection system, an environmentally friendly catalyzer exhaust and a fully automatic gas it and go transmission, the BWs125 is economical to operate and a ton of fun to ride. Two-up seating means you can share the fun with a friend. The single cylinder 125 cubic centimeters, four-valve engine provides plenty of power while the fully automatic transmission and electric starting make it a snap to operate.