This is from the site Bring a Trailer (https://bringatrailer.com/) ...
This 1985 Honda CB700SC Nighthawk S is finished in red with a black frame and powered by a twin-cam 696cc inline-four paired with a six-speed transmission and shaft drive. The bike was recently acquired by selling dealer, reportedly from its second owner of 10 years. Subsequent work included rebuilds of the carburetors and fork as well as replacement of the tires, fuel and vacuum hoses, spark plugs, and more. This Nighthawk S is offered at no reserve with manuals, a factory tool set, and a clean Wisconsin title.
The fenders, side panels, tank, and fairing have been repainted in solid red rather than the factory two-tone scheme, and are contrasted by a black frame, engine case, and exhaust system. Damage is noted to the right rear muffler, and corrosion is present on the kickstand. Replica mirrors and replacement rubber turn signal boots have been installed by the selling dealer.
Factory wheels measure 16″ front and rear and have been fitted with new Metzler tires. The bike was equipped with Honda’s second-generation TRAC anti-dive system from the factory, and the front forks have been rebuilt with new seals and oil. Braking is handled by dual front discs and a rear drum.
Instrumentation includes a 150-mph speedometer, a tachometer with a 10,700-rpm redline, a temperature gauge, and a digital gear indicator. Just under 13k miles are shown on the five-digit odometer. The seat was reupholstered under previous ownership,
The 696cc four features double overhead cams and was factory rated at 80 horsepower with 42 lb-ft of torque when new. The Nighthawk S featured an automatic timing chain tensioner, a spin-on oil filter, and electronic ignition from the factory. Power is sent to the rear wheel via a six-speed transmission and shaft drive. The selling dealer rebuilt the quadruple Keihin carburetors, changed the oil, and replaced the spark plugs and battery in preparation for the sale.
An owner’s manual and factory tool set are included in a plastic hardshell case. A start-up and walk-around video is viewable below.
A start-up and walk-around video is viewable above, and a second video of the bike running highlighting the exhaust sound is viewable below.