Honda CB750SC Nighthawk S

Honda CB750SC Nighthawk S
Manufacturer	Honda
Production	1984 - 86
Class	Standard
Engine	Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder.
Compression ratio	9.3:1
Top Speed	131.2 mph
Ignition	CDI
Transmission	5 Speed
Frame	Dual downtube, full cradle, mild steel
Suspension	Front: 37mm Air assisted forks Rear: Dual shocks
Brakes	Front: 2x 276mm disc 2 piston caliper Rear: 180mm Drum
Front Tire	110/90 H16
Rear Tire	130/90 H16
Wheelbase	1544 mm / 60.8 in
Weight	213 lg / 466 lbs (dry), 226 kg / 497 lbs (wet)
Recommended Oil	Honda GN4 10W-40
Fuel Capacity	16 Liters / US 4.2 gal
Manuals	Service Manual

It could reach a top speed of 131.2 mph.

Engine

The engine was a Air cooled, cooled Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder.. The engine featured a 9.3:1 compression ratio.

Drive

Power was moderated via the Wet plate.

Chassis

It came with a 110/90 H16 front tire and a 130/90 H16 rear tire. Stopping was achieved via 2x 276mm disc 2 piston caliper in the front and a 180mm Drum in the rear. The front suspension was a 37mm Air assisted forks while the rear was equipped with a Dual shocks. The CB750SC Nighthawk S was fitted with a 16 Liters / US 4.2 gal fuel tank. The bike weighed just 213 lg / 466 lbs. The wheelbase was 1544 mm / 60.8 in long.

Photos

Overview

Honda CB 750SC Nighthawk S

The big 'Hawk incorporates all the high-performance/low-maintenance features which have made the Nighthawks so popular: a rubber-mounted in-line four-cylinder engine with oil cooler and 16 hydraulically adjusted valves, hydraulic clutch, automatic cam-chain tensioner and fully electronic ignition. The shaft drive is low on lash and maintenance free, and the 16-inch front. wheel, with TRAC anti-dive and an integrated fork brace, delivers nimble yet stable handling. The rear end is steadied by a pair of VHD shocks with four-way-adjustable rebound damping and box-section swingarm

Honda introduced the Nighthawk in the 1982 model year. It was initially produced in three sizes, the CB450SC, CB650SC & CB750SC models. All of these models borrowed heavily from the existing CB models, yet there were enough styling and substantive improvements to warrant designating them as new models. The CB450SC Nighthawk was an improvement upon the CB400, with an increase in engine size, improved internal lubrication system, hardened transmission gears, six speed tranmission, chain drive, cast wheels, disc front brake, air-adjustable fork, and VHD shocks. In it's first year, the 650 Nighthawk was equipped with Honda's last remaining SOHC in-line 4 cylinder engine, a 5 speed transmission, chain drive, and Comstar wheels. The CB750SC Nighthawk began it's run as a chain drive, 16 valve, DOHC in-line four cylinder, using the existing CB750 engine, but with everything else restyled and redesigned.

1983 brought many changes. The CB550SC Nighthawk , a cruiser styled Nighthawk, was introduced. The CB650SC Nighthawk was totally redesigned, producing a package which rivaled other companies 750's, including shaft drive, self adjusting cam chains, improved braking, handling, ergonomics, and visual appeal. The CB750SC was still offered but that would come to a hault when In 1983 the U.S. government, in an effort to keep Harley-Davidson afloat, imposed strict tariffs on imported motorcycles exceeding 700cc's. The 700 Nighthawk S was produced in 1984-86 in an effort to make a larger model Nighthawk that was still able to be sold in the U.S. The 700s hit the showrooms with an all new engine, with DOHC and automatic cam chain tensioners. The bikes were shaft driven, and came standard with a small fairing, giving the bike a sportier appearance. This model remained until 1986, the last year of the Nighthawk's initial existence. The 550 was dropped after the 1983 model year. The 450 was not produced in 84, but was reintroduced in 1985 & 1986 model years. The 650 saw it's last production in the 1985 model year.

1987 brought sportier bikes, cruisers, and touring rigs, but no Nighthawks!! This intolerable situation persisted until 1990, when Honda, finally realizing the error of it's ways, resurrected the Nighthawk series in the 1991 model year. The bike was bike. The new version came in two sizes, a 250cc twin, and a 750cc inline 4 cylinder (size was not a problem now that Harley-Davidson was healthy again). Both of these machines were very well designed and affordable, a package hard to beat. Having achieved perfection at last, Honda has wisely left the design untouched , except for moving the location of the helmet lock in the 93 and later bikes, color changes, and a blacked out engine in 1997 and later bikes). The new 750 died off yet again leaving the Nighthawk name with the lesser 250cc. Today the "little bird" is used as a training bike for the MSF's(motorcycle safety foundation).

Make Model	Honda CB 750SC Nighthawk S
Year	1984 - 86
Engine Type	Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder.
Displacement	749 cc / 45.7 cu-in
Bore X Stroke	62 x 62 mm
Cooling System	Air cooled,
Compression	9.3:1
Lubrication	Wet sump
Induction	4x 30mm Keihin carburetors
Ignition	CDI
Starting	Electric
Max Power	70 hp / 51.1 kW @ 7200 rpm
Max Torque	56.2 Nm / 41.5 ft-lb @ 7500 rpm
Clutch	Wet plate
Transmission	5 Speed
Final Drive	Shadt
Frame	Dual downtube, full cradle, mild steel
Front Suspension	37mm Air assisted forks
Front Wheel Travel	152 mm / 5.9 in
Rear Suspension	Dual shocks
Rear Wheel Travel	93 mm / 3.6 in
Front Brakes	2x 276mm disc 2 piston caliper
Rear Brakes	180mm Drum
Front Tire	110/90 H16
Rear Tire	130/90 H16
Rake	29.6°
Trail	119 mm / 4.7 in
Dimensions	Height 792 mm / 31.2 in Length 2184 mm / 86.0 in Width 800 mm / 31.5 in
Wheelbase	1544 mm / 60.8 in
Ground Clearance	163 mm / 6.4 in
Dry Weight	213 lg / 466 lbs
Wet Weight	226 kg / 497 lbs
Fuel Capacity	16 Liters / US 4.2 gal
Consumption Average	42.2 mpg
Standing ¼ Mile	13.1 sec / 102.6 mph
Top Speed	131.2 mph