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MotoLibrary Score
35/100Commuter
Power
10 HP
Top Speed
95 km/h
Torque
6 Nm
Engine
89 ccm
Technical Overview
1969 Jawa 90 Roadster Technical Analysis & Specification Breakdown
Engineered by Jawa for the classic motorcycle segment, the 1969 Jawa 90 Roadster pairs a 88.7 cc (5.4 cu in) air-cooled single cylinder, two-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 10.2 HP (7.4 kW) at 6,500 rpm while maximum torque reaches 6.4 Nm (4.7 lb-ft) at 5,500 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 115 HP per liter and a 1,000 rpm working window between peak torque (5,500 rpm) and peak power (6,500 rpm), the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.
On the scales, the 90 Roadster measures 85 kg (187 lbs) wet (curb), translating to a power-to-weight ratio of 0.12 HP/kg (8.33 kg per horsepower). Rider ergonomics and chassis geometry center around a 1,130 mm (44.5 in) wheelbase engineered for quick, flickable steering geometry.
Specific Output
115 HP/L
Power-to-Weight
0.12 HP/kg (8.33 kg/HP)
Power Band Window
5,500–6,500 rpm
Engine
Displacement88.7 ccm (5.41 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Power10.2 HP (7.4 kW)) @ 6500 RPM
Torque6.4 Nm (0.6 kgf-m or 4.7 ft.lbs) @ 5500 RPM
Compression8.5:1
Fuel SystemCarburettor. Jikov
CoolingAir
Max RPM8000
Transmission
Gearbox5-speed
Final DriveChain (final drive)
Performance
Top Speed95.0 km/h (59.0 mph)
Fuel Consumption3.20 litres/100 km (31.3 km/l or 73.51 mpg)
Greenhouse Gases74.2 CO2 g/km. (CO2 - Carbon dioxide emission)
Chassis
Wheelbase1130 mm (44.5 inches)
Wheels & Brakes
Front Tyre2.5-18
Rear Tyre2.75-18
Front BrakesExpanding brake (drum brake)
Front Brake Ø125 mm (4.9 inches)
Rear BrakesExpanding brake (drum brake)
Rear Brake Ø125 mm (4.9 inches)
Dimensions & Weight
Weight incl.85.0 kg (187.4 pounds)
Alt. Seat Height780 mm (30.7 inches) If adjustable, highest setting.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
