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1978 Honda C90 K3
1978 Honda C90 K3
Honda's profilation of this bike
20 YEARS ON FROM PRODUCING THE FIRST STEP THRU MOTOR SCOOTER HONDAS POPULARITY IS STILL SO STRONG WE BELIEVE YOU WILL AGREE YOU WILL MEET THE NICEST PEOPLE ON A HONDA

General information
Model:Honda C90 K3
Year:1978
Category:Scooter
Engine and transmission
Displacement:89.00 ccm (5.43 cubic inches)
Engine type:Single cylinder
Stroke:4
Power:7.50 HP (5.5 KW)) @ 9500 RPM
Torque:0.67 Nm (0.1 kgf-m or 0.5 ft lbs) @ 6000 RPM
Max RPM:10000
Compression:8.2:1
Bore x Stroke:50.0 x 45.6 mm (2.0 x 1.8 inches)
Fuel system:Carburettor. keihin seiki
Valves per cylinder:2
Fuel control:OHC
Ignition:contact breaker points
Starter:Kick
Lubrication system:wet sump
Cooling system:Air
Gearbox:3-speed
Transmission type
final drive:
Chain
Clutch:multi plate wet automatic
Physical Measurements
Dry weight:85.0 kg (187.4 pounds)
Weight incl. oil, gas, etc:91.6 kg (201.9 pounds)
Front percentage of weight:40.0
Rear percentage of weight:60.0
Seat height:790 mm (31.1 inches) If adjustable, lowest setting.
Overall height:995 mm (39.2 inches)
Overall length:1,830 mm (72.0 inches)
Overall width:640 mm (25.2 inches)
Ground clearance:130 mm (5.1 inches)
Wheelbase:1,190 mm (46.9 inches)
Chassis and dimensions
Frame type:pressed steel monoque with engine part of loadbearing
Rake (fork angle):27.0°
Trail:75 mm (3.0 inches)
Front Suspension:hydraulically dampened leading link forks
Front Suspension travel:75 mm (3.0 inches)
Rear Suspension:hydraulically dampened with compression spring
Rear Suspension travel:100 mm (3.9 inches)
Front brakes:Expanding brake (drum brake). twin expanding shoe
Front brakes diameter:110 mm (4.3 inches)
Rear brakes:Expanding brake (drum brake). twin expanding shoe
Rear brakes diameter:110 mm (4.3 inches)
Exhaust system:sinle stainless steel pipe
Speed and acceleration
Top speed:80.0 km/h (49.7 mph)
Power/weight ratio:0.0882 HP/kg
Other specifications
Fuel capacity:5.50 litres (1.45 gallons)
Reserve fuel capacity:1.00 litres (0.26 gallons)
Fuel consumption pr. 10 km (6.2 miles):2.50 litres (0.66 gallons)
Color options:BRIGHT RED. METALLIC SAVANNAH GREEN. METALLIC STRATO BLUE. METALLIC DARK GREY
Comments:DURING 1978 HONDA WAS ALREADY LEGENDARY FOR THEIR STEP THRU SCOOTER BIKES. THE PERFORMANCE THEY ACHIEVED THROUGH TECHNICAL ADVANCMENTS FROM THEIR SMALL OVERHEAD CAMSHAFT MOTORS WAS INCREDIBLE. SIMILIAR MODELS ARE STILL AVALIABLE TODAY
The 1978 Honda C90 K3 and all other motorcycles made since 1970
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