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Honda S-90back 1966 forward

Engine and transmission
Engine type: 1 cylinders, 4-stroke, Single
Displacement: 89 cc (5.44 cubic inches)
Bore × stroke: 1.97 inch × 1.8 inch (oversquare - shortstroke)
Cooling system: Air cooled
Power: 8.02 HP (5.9 kW) @ 9500 rpm (cranksh)
Torque: 6.37 Nm (4.7 lb-ft) @ 8000 rpm (cranksh)
Throttle: Cable operated
Valves
Valve train: SOHC, non-variable
Fuel and ignition
Sparks per cylinder: 1
Fuel supply system: Carburetor
Compression: 8.2:1
Engine mounting: Transverse
Lubrication system: Wet sump
Gear box: Manual 4-speed
Clutch: Wet, multiple discs, cable operated
Final drive: Chain
Starter: Kick-starter
Dimensions
Physical measures
Length: 74.4 inch
Width: 25.6 inch
Height: 38.6 inch
Wheel base: 47 inch
Ground clearance: 5.71 inch
Weight
Curb weight: 176.4 lbs
Chassis and suspension
Frame type: steel, Backbone frame
Front
Suspension: Cartridge
Brake: Drum
Rear
Suspension: twin shock, Swingarm
Brake: Drum
Other
ABS available: No
Power-to-weight ratio: 0.07 KW/lbs (13.56 lbs/HP)
Top speed: 62.14 mph
Fuel capacity: 1.85 gals
Number of riders: 2 persons

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