The CB650SC (also called the Nighthawk 650) is a Honda standard motorcycle sold in the US from 1982 to 1985.

Honda CB650SC
ManufacturerHonda
Also calledNighthawk 650
Production1982–1985
ClassStandard
Engine1983-1985: 656 cc (40.0 cu in) DOHC, air/oil-cooled inline four
Compression ratio1983-1985: 9.5:1
Power1983-1985: 72 hp (54 kW) at 9,500 rpm (SAE net at the crank)[1]
Ignition typeElectric start
Transmission6-speed overdrive, shaft drive
Frame typeTubular steel full cradle
SuspensionFront: Showa air-spring, 39mm stanchion tube diameter, brake-actuated hydraulic anti-dive
Rear: dual Showa shocks, 5-way adjustable spring preload, 4-way adjustable rebound damping
BrakesFront: Dual single-action hydraulic calipers, 10.9 in (276 mm) discs
Rear: Drum, single-leading shoe, rod-operated
TiresFront: 100/90-19
Rear: 130/90-16
Rake, trail3.86 in (98 mm)
Wheelbase57.8 in (1,470 mm)
Seat height30.7 in (780 mm)
Weight451 lb (205 kg)[citation needed] (dry)
Fuel capacity12.9 L (2.8 imp gal; 3.4 US gal)), (0.5 US gallon reserve)
Fuel consumption29–55 mpg (US)[citation needed]
RelatedCB700SC

In 1982, the Nighthawk replaced the Custom of the previous years and featured a re-designed tank and side covers. In 1983-1985 a new DOHC engine replaced the SOHC engine used from 1979-1982. The new engine had hydraulic valve lash adjusters and was rubber mounted. This year also saw the move from chain drive to shaft-drive for this model.

References

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  1. ^ American Honda Motor Co. Inc. (1983). Nighthawk 650 1984 [Brochure].
    American Honda Motor Co. Inc. (1984). Nighthawk 650 1985 [Brochure].
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Full specs on this motorcycle can be found here