Saito FA -72 with stub exhaust and original muffler and box Up for sale is a Saito FA -72 with stub exhaust and original muffler and box. Valves have been set to factory specs. The FA-72 is a fantastic running four stroke that is a great size. Engine is in very good condition throughout. Engine Type: 4-Stroke Displacement: 0.720 cu. in. Cylinders: 1 General Specs: - 1 cylinder - Displacement: 0.720 cubic inches - Bore: 1.060 (in.) - Stroke In: 0.811 (in.) - Low RPM: 2200 - High RPM: 10200 - 1.200 bhp - Weight (no muffler): 16.57 oz.