Yamaha · Model— HX90
HX90
1 generation1971 - 1971Naked
About generation HS2
1971
- Years
- 1971+
- Frame codes
- HS2
- Class
- Naked
Specifications
9 groupsGeneral
3- Market
- Japanese domestic (JDM)
- Model code
- HS2
- Manufacturer
- YAMAHA
Engine
17- Bore
- 36.5 mm
- Cooling
- Air-cooled
- Power
- 10.5 hp
- Power RPM
- 8,000 rpm
- Stroke
- 43 mm
- Cylinders
- 2
- Torque RPM
- 7,500 rpm
- Engine code
- HS2
- Fuel system
- Carburetor
- Engine type
- 2-stroke
- Torque (kgf·m)
- 0.96 kgf·m
- Lubrication
- Separate oil injection (2T)
- Cylinder layout
- Inline
- Displacement
- 89 cc
- Fuel system model
- VM17SC
- 2-stroke intake
- Piston reed valve
- Compression ratio
- 7
Transmission
8- Type
- Return shift
- Gears
- 5
- Clutch
- Wet multi-plate
- Shift type
- Foot shift
- Final drive
- Chain
- Gear ratios
- 3.181 / 1.812 / 1.3 / 1.045 / 0.84
- Primary reduction
- 3.894
- Secondary reduction
- 3
Chassis
15- Frame
- Diamond
- Rear tire
- 2.50-18
- Front tire
- 2.50-18
- Rear brake
- Drum (leading-trailing)
- Front brake
- Drum (leading-trailing)
- Rear rim width
- 1.4
- Rear tire type
- Tube type
- Front rim width
- 1.4
- Front tire type
- Tube type
- Rear suspension
- Swingarm
- Front suspension
- Telescopic fork
- Rear ply rating
- 4PR
- Front ply rating
- 4PR
- Rear tire construction
- Bias
- Front tire construction
- Bias
Dimensions
8- Trail
- 90 mm
- Width
- 750 mm
- Height
- 1,000 mm
- Length
- 1,860 mm
- Rake
- 60.5 °
- Wheelbase
- 1,200 mm
- Ground clearance
- 160 mm
- Turning radius
- 2 m
Weight
3- Dry weight
- 95 kg
- Wet weight
- 104 kg
- Seats
- 2
Capacities
2- Fuel tank
- 7.5 l
- 2T oil tank
- 1.4 l
Electrical
4- Starter
- Kick starter
- Spark plug
- B7HS
- Taillight rating
- 20W/8W
- Headlight rating (high)
- 25W/25W
Performance
5- Range
- 487.5 km
- Rear tire pressure
- 2 kgf/cm²
- Front tire pressure
- 1.6 kgf/cm²
- Measure standard
- At 40 km/h
- Fuel economy
- 1.5 L/100km
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