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{{DISPLAYTITLE:{{PAGENAME}} Nighthawk: history, specs, pictures}}
{{Infobox Motorcycle
{{Motorcycle
|name            = Honda CB550SC
|name            = Honda CB 550 Nighthawk
|image            =  
|photo= 1983-Honda-CB550SC-Red-426-1.jpg
|aka              =  
|aka              =  
|manufacturer    = Honda
|manufacturer    = [[Honda]]
|parent_company  =
|parent_company  =  
|production      = 1983 - 1984
|production      = 83
|model_year      =
|model_year      =  
|predecessor      =
|predecessor      =  
|successor        =
|successor        =  
|class            = Standard
|class            =  
|engine          = Air cooled, transverse four cylinder, four stroke, SOHC, 2 valves per cylinder
|engine          = 550cc
|bore_stroke      = 58.4mm x 58.4mm
|bore_stroke      =  
|compression      = 9.5:1
|compression      =  
|top_speed        =110 mph
|top_speed        =  
|power            = 74.96 HP (55.9 KW) @ 9500RPM
|power            =  
|torque          = 27.29 ft/lbs (37.0 Nm) @ 8000RPM
|torque          =  
|fuel_system      = 4x30mm Keihin carburetors
|ignition        =  
|ignition        =
|spark_plug      = {{sparkplug|DPR8EA-9}} '83
|spark_plug      = {{sparkplug|NGK DPR8EA-9}} '83
|battery          = {{battery|YB12AL-A}} '83
|battery          = {{battery|YUASA YB12AL-A}} '83
|transmission    =  
|transmission    = Gear box: 6 Speed <br>
|frame            =  
Final Drive: Shaft <br>
|suspension      =  
 
|brakes          =  
|final_drive= Shaft
|front_tire      = {{tire|100/90-19}} '83
|frame            =
|rear_tire    = {{tire|130/90-16}} '83
|suspension      =Front: Telescopic fork <br>
|rake_trail      =  
Rear: Swing arm
|wheelbase        =  
|brakes          =Front: Single 320mm disc <br>Rear: Drum
|length          =  
|front_tire      = {{tire|100/90-19}}  
|width            =  
|rear_tire    = {{tire|130/90-16}}  
|height          =  
|rake_trail      =
|seat_height      =  
|wheelbase        = 56.69 inches (1440 mm)
|dry_weight      =  
|length          =
|wet_weight      =  
|width            =
|fuel_capacity    =  
|height          =
|oil_capacity    =  
|seat_height      =
|fuel_consumption =  
|dry_weight      =
|turning_radius  =  
|wet_weight      = 207.0 kg
|related          =  
|fuel_capacity    =
|competition      =  
|oil_capacity    =
|recommended_oil= Honda GN4 10W-40
|fuel_consumption = 4.90 liters/100 km (20.4 km/l or 48.00 mpg)
|turning_radius  =
|related          =
|competition      = [[Kawasaki KZ550H]]<br />[[Suzuki GS550E]]
|air_filter= {{airfilter|K&N HA-5583}} `83<ref name="kl_2019">{{cite book|title=2019 K&L Supply Co Catalog|publisher=[https://www.klsupply.com/ K&L Supply Co]|date=2019}}</ref>
}}
}}


The '''[[Honda]] CB 550 Nighthawk''' was a Air cooled, transverse four cylinder, four stroke, SOHC, 2 valves per cylinder Cruiser [[motorcycle]] produced by [[Honda]] in 1982. It could reach a top speed of 116 mph (186 km/h). Max [[torque]] was 26.92 ft/lbs (36.5 Nm) @ 8000 RPM. Claimed [[horsepower]] was 73.35 HP (54.7 KW) @ 9500 RPM.
The '''Honda CB550SC''' is a [[motorcycle]] produced by [[Honda]] in 1983.
 


==Overview==
This is a 550 Four performance cruiser, factory rated at 75 bhp at 9500 rpm, 36.5 lb.-ft. at 8000 rpm. Potent [[air-cooled]], [[DOHC]], link-plate cam chain, four valves per cylinder, offset [[rocker arm]]s with hydraulic lash adjusters, plain bearing crankshaft, helical primary gears, hydraulic multi-plate wet clutch, six-speed transmission, shaft final drive.  
This is a 550 Four performance cruiser, factory rated at 75 bhp at 9500 rpm, 36.5 lb.-ft. at 8000 rpm. Potent [[air-cooled]], [[DOHC]], link-plate cam chain, four valves per cylinder, offset [[rocker arm]]s with hydraulic lash adjusters, plain bearing crankshaft, helical [[primary gears]], hydraulic multi-plate wet clutch, six-speed transmission, shaft final drive.  


This is the smaller version of [[Honda]]'s 1983 inline Four, introduced in the Nighthawk 650 and Nighthawk 550 for 1983. The engines share crankcase castings, clutch, transmission and cylinder head. The 572cc 550 has lower primary gearing and the same 60mm bore as the 650; stroke is shorter; 50.6mm to 58mm. To work with the 50.6mm stroke, the 550 has shorter [[connecting rod]]s, crankshaft throws and cylinders. The crankshaft, designed for the 572cc version, is lighter with 1mm smaller diameter journals; the cases are machined to fit.
This is the smaller version of [[Honda]]'s 1983 inline Four, introduced in the Nighthawk 650 and Nighthawk 550 for 1983. The engines share crankcase castings, clutch, transmission and cylinder head. The 572cc 550 has lower primary gearing and the same 60mm bore as the 650; stroke is shorter; 50.6mm to 58mm. To work with the 50.6mm stroke, the 550 has shorter [[connecting rod]]s, crankshaft throws and cylinders. The crankshaft, designed for the 572cc version, is lighter with 1mm smaller diameter journals; the cases are machined to fit.
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The Nighthawk's tall sixth gear is made for highway cruising at a leisurely pace, bringing engine rpm at 60 mph down to 4400 rpm from fifth gear's 5200 rpm.
The Nighthawk's tall sixth gear is made for highway cruising at a leisurely pace, bringing engine rpm at 60 mph down to 4400 rpm from fifth gear's 5200 rpm.
==Engine==
A 58.4mm [[bore]] x 58.4mm [[stroke]] result in a [[displacement]] of just 572.0 cubic centimeters. 
==Drive==
The bike has a 6 Speed transmission. 
==Chassis==
It came with a 100/90-19 front [[tire]] and a 130/90-16 rear tire. Stopping was achieved via Single 320mm disc in the front and a Drum in the rear. The front suspension was a  Telescopic fork while the rear was equipped with a Swing arm. The wheelbase was 56.69 inches (1440 mm) long. 




==1983==
==1983==
<gallery mode="packed-hover">
<gallery>
Image:1983_honda_Cb550sc.jpg|1983 Honda Nighthawk 550
Image:1983_honda_Cb550sc.jpg|1983 Honda Nighthawk 550
Image:1983-Honda-CB550SC-Black-0.jpg|1983 Honda Nighthawk 550 (CB550SC) in Black
Image:1983-Honda-CB550SC-Black-0.jpg|1983 Honda Nighthawk 550 (CB550SC) in Black
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*Weight: 190 kg (418.8 lb)
*Weight: 190 kg (418.8 lb)
*The serial number began JH2PC0901EM000023
*The serial number began JH2PC0901EM000023
==References==
{{reflist}}
{{motorcycle-stub}}
{{motorcycle-stub}}
{{Honda CB}}
{{Honda CB}}
{{Honda}}
 
[[Category:Honda motorcycles|CB550SC]]
[[Category:Honda motorcycles|CB550SC]]
[[Category:1980s motorcycles]]
[[Category:1980s motorcycles|CB550SC]]
[[Category:Honda Nighthawk series]]
[[Category:Honda Nighthawk series]]
[[Category:Honda CB series]]
[[Category:Honda CB series]]
[[Category:Standard motorcycles]]

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