Yamaha DX100 was a 100cc,

air-cooled Air-cooled engines rely on the circulation of air directly over heat dissipation fins or hot areas of the engine to cool them in order to keep the engine within operating temperatures. In all combustion engines, a great percentage of the heat ge ...

two-stroke A two-stroke (or two-stroke cycle) engine is a type of internal combustion engine that completes a Thermodynamic power cycle, power cycle with two strokes (up and down movements) of the piston during one power cycle, this power cycle being comple ...

commuter motorcycle manufactured by

Yamaha Motor Company is a Japanese multinational manufacturer of motorcycles, marine products such as boats and outboard motors, and other motorized products. The company was established in 1955 upon separation from Yamaha Corporation (however, Yamaha Corporation ...

from 1975 to 1981. It had a 4-speed gearbox utilizing an all-up configuration with a toe-heel shifter. The engine produced approximately 8 hp with in a narrow

RPM Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is a unit of rotational speed or rotational frequency for rotating machines. Standards ISO 80000-3:2019 defines a unit of rotation as the dimensionl ...

band. The bike was equipped with front and rear drum brakes. Electrics were 6 volt, and two-stroke oil is injected to cylinder through Auto-Lube. Top speed with a single rider was approximately . Although good for city commuting, the bike lacked power and speed to keep up with freeway speeds. Yamaha DX100 was very closely related to the more popular Yamaha YB100 with slightly different graphics and fuel tank shape. However, both are mechanically the same. Yamaha DX100 was aimed against competitors such as

Suzuki is a Japan, Japanese multinational corporation headquartered in Minami-ku, Hamamatsu, Japan. Suzuki manufactures automobiles, motorcycles, All-terrain vehicle, all-terrain vehicles (ATVs), outboard motor, outboard marine engines, wheelchairs ...

A100 and Suzuki A80.

References

{{reflist DX100 Two-stroke motorcycles Motorcycles introduced in 1975