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1999 Yamaha Zuma Specs

The Yamaha Zuma was introduced in 1989 and continued one more year before being withdrawn from the U.S. market. It reappeared in 1997 and quickly became the best-selling scooter in North America for the next ten years. There were two color choices that changed every year. In 1999, the colors were black and red. Like every year, there was a Zuma and a Zuma II that was slightly smaller.

Engine
- All Zuma engines are 2-stroke and air-cooled, with a fan for cooling while idling. It has a displacement of 49 cubic centimeters, a bore and stroke of 40 and 39.2 millimeters, a compression ratio of 7.0 to 1 and a maximum torque of 5.1 foot pounds at 6,000 RPM. The valves are operated by a single-reed system--a check valve that allows atomized fuel and exhaust to flow in one direction only.
Frame
- The frame is the only place where the Zuma differs from the Zuma II. The length is 74.4 inches and 68.3 for the Zuma II, the width is 27.8 inches and 24.8 for the Zuma II, the height is 43.7 inches and 41.5 for the Zuma II and the wheelbase is 50.2 inches and 46 for the Zuma II. The seat height is 30.1 inches and 29.3 for the Zuma II, and the weight is 206.8 pounds and 159 for the Zuma II.
Tires
- The front tires are 120/90-10, and the back tires are 130/90-10. The front brake is a 180-millimeter disk brake, and the back brake is a regular drum brake. The front suspension is a telescopic fork, and the back suspension is a single swing arm shock. The tires that come on the scooter are knobby off-road tires, but they can be exchanged for smoother tires if you only ride on city streets. The suspension is built more for comfort than maneuvering, so there is little warning if you are turning so sharply the steering is going to go out, which you should avoid.
Fuel Delivery System
- The carburetor is a Yeikei Y14P carb, and the ignition is a Capacitive Discharge Ignition (CDI) system. The Zuma gets 148 miles per gallon, and the fuel tank holds 1.2 gallons. The 2-stroke engine requires oil be mixed with the gasoline--this produces a characteristic blue exhaust plume and more pollution than a 4-stroke engine of similar size that does not burn oil in the piston cylinders.

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