The Yamaha LB 70 Chappy is powered by a single-cylinder, air-cooled, two-stroke engine. The displacement of the engine is 65 cc, or 3.97 cubic inches. The engine features 1.9-inch-by-1.7-inch bore and stroke and a compression ratio of 5.8 to 1. A Mikuni carburetor delivers fuel, which goes through a membrane fuel control system. At 6,000 revolutions per minute, this configuration delivers 4.8 horsepower, or 3.5 kilowatts. The engine produces a maximum torque of 5.9 newton meters, or 4.4 foot pounds, at 4,000 rpm.
The Yamaha LB 70 Chappy is equipped with a standard forks front suspension and a monoshock rear suspension. The drum front and rear brakes provide ample braking power. The scooter comes with 4.00-8-4PR front and back tires.
The Chappy weighs 73 kg, or 160.9 pounds, resulting in a .0658 HP/kg power-to-weight ratio. The 28-inch seat is positioned 5.3 inches from the ground. The wheelbase is 41.3 inches long. The scooter is 61.6 inches long, 26.2 inches wide and 36.4 inches high.
The Yamaha LB 70 Chappy is equipped with a .92-gallon fuel tank, and its fuel consumption is 78.41 mpg. The scooter reaches a speed of 72.4 km/h, or 45 mph. It produces an average of 69.6 carbon dioxide g/km of greenhouse gas emissions.