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MotoLibrary Score
41/100Commuter
Power/Weight
0.23 hp/kg
Top Speed
110 km/h
Torque
27 Nm
Engine
246 ccm
Technical Overview
1978 Yamaha IT 250 E Technical Analysis & Specification Breakdown
Built around Yamaha's enduro - offroad motorcycle platform, the 1978 Yamaha IT 250 E utilizes a 246 cc (15 cu in) air-cooled single cylinder, two-stroke layout. In factory specification, peak output is rated at 26.1 HP (19.1 kW) at 7,500 rpm while maximum torque reaches 26.5 Nm (19.5 lb-ft) at 7,000 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 106.1 HP per liter and a 500 rpm working window between peak torque (7,000 rpm) and peak power (7,500 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 IT 250 E measures 111.6 kg (246 lbs) dry, translating to a power-to-weight ratio of 0.23 HP/kg (4.28 kg per horsepower). The 12.11-liter (3.2 US gal) fuel tank paired with a rated consumption of 3.92 L/100 km provides an estimated theoretical range of roughly 309 km (192 miles) between fill-ups, while factory top speed is listed at 110 km/h (68 mph).
Specific Output
106.1 HP/L
Power-to-Weight
0.23 HP/kg (4.28 kg/HP)
Power Band Window
7,000–7,500 rpm
Theoretical Range
~309 km (192 mi)
Engine
Displacement246.0 ccm (15.01 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Power26.1 HP (19.1 kW)) @ 7500 RPM
Torque26.5 Nm (2.7 kgf-m or 19.5 ft.lbs) @ 7000 RPM
Compression7.8:1
Bore x Stroke70.0 x 64.0 mm (2.8 x 2.5 inches)
Fuel SystemCarburettor. VM 36 SC
IgnitionCDI magneto
LubricationPre-mix
CoolingAir
Max RPM12000
Transmission
Gearbox5-speed
Final DriveChain (final drive)
ClutchWet plate
Performance
Top Speed110.0 km/h (68.4 mph)
Fuel Consumption3.92 litres/100 km (25.5 km/l or 60.01 mpg)
Greenhouse Gases90.9 CO2 g/km. (CO2 - Carbon dioxide emission)
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.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
