Price: $3,899 Stock Number: M397 2013 Yamaha® BW®s 125 The BW®s125 is powered by a peppy, reliable 125cc, 4-stroke engine Featuring a gas sipping fuel injection system, an environmentally friendly catalyzer exhaust and a fully automatic gas it and go transmission, the BW®s125 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 125cc, 4-valve engine provides plenty of power while the fully automatic transmission and electric starting make it a snap to operate.