History of Honda | History of the Nighthawk | Nighthawk 250 | Nighthawk 450 | Nighthawk 550 | Nighthawk 650 | Nighthawk 700S | Nighthawk 750 |
Nighthawk 750S (Not sold in USA) | Your Nighthawk | Maintenance and Repair | Helpful Links | About Paul | Back Home
The Honda Nighthawk 750 is the grandson of the most
significant motorcycle ever made-- the 1970 Honda CB750.
The Nighthawk
stays true to its heritage: Air cooled 750cc inline-four engine,
double-cradle frame, single disk front and drum rear brake, and chain
drive. The differences are ones of evolutionary refinement. It has
hydraulic valve adjusters for zero-maintenance valves. Electronic ingition
means there's no more fiddling with the idle speed. The engine's width is
narrower as Honda has relocated the alternator behind the cylinders. They
also added a small oil cooler to supplement the air cooling. Wheels are
cast aluminum rather than spoked. The exhaust is a more modern
four-into-two variety.
This is a do-it-all bike. It doesn't do
anything with exquisite skill but it does everything reasonably well and
for that it deserves a lot of credit. In stock form it's a nimble
commuter. Attach a windscreen and luggage and you've got a lightweight
touring bike. It's fun to drive too. Though it's no racer it is quick
enough and the handling is reasonable and responsive. It feels lighter
than it really is. The Nighthawk's reliability is legendary. It demands as
little attention as any motorcycle and maintenance is cheap. Change the
oil regularly and it will run forever.
(The above taken from David's Motorcycle Reviews)
Unfortunately the last production year for the Nighthawk 750 was 2003.
Specs & Performance
MSRP -- $3098
PERFORMANCE
|
Standing Start 1/4 mile
|
13.109 seconds_@_102.62 mph |
|
Engine rpm @ 60 mph, top gear
|
4344 |
|
Average fuel consumption rate
|
42.2 mpg (17.9
km/l |
|
Cruising range, main / reserve
|
139 / 55
miles |
|
Load capacity (GVWR less curb
weight) |
371.5 lbs. (168.5
kg) |
|
Maximum speed in gears @ engine
redline |
(1) 49.9 (2) 70.7 (3) 90.9 (4)
109.0 (5) 131.2 |
|
Type |
4 Stroke, transverse four
cylinder with two overhead camshafts,
chain-driven |
|
Bore and stroke
|
62.0 x 62.0 mm (2.44 x 2.44
in.) |
|
Piston displacement
|
749cc (45.7 cu.
in.) |
|
Compression ratio
|
9.0:1 |
|
Carburetion |
4 Keihin 30mm constant-vacuum
with accelerator pump. |
|
Exhaust system
|
Four into
four |
|
Ignition |
Battery-powered, inductive,
magnetically triggered and electronically advanced.
|
|
Air filtration
|
Paper element
disposable |
|
Oil filtration
|
Paper element
disposable |
|
Oil capacity
|
4.8 qts (4.5
liters) |
|
65.57 @
9000 | |
|
41.54 ft. lbs @
7500 |
|
Type |
Five-speed, constant-mesh,
multi-plate wet clutch |
|
Primary drive
|
Hy-Vo chain and spur gears,
2.38:1 |
|
Final drive |
# 530 sealed O-ring chain,
2.39:1 |
|
Gear ratios, overall
|
(1) 14.40 (2) 10.17 (3) 7.91 (4)
6.59 (5) 5.48 |
|
Type |
Dual downtube, full-cradle, mild
steel frame |
|
Suspension, front
|
Leading-axle coil / air spring
fork with anti-dive yielding 154mm (6.1 in.)
travel |
|
Suspension, rear
|
Swing arm, (2) VHD (Variable
Hydraulic Damping) shocks with five spring preload adjustments
yielding 93mm (3.7 in.) travel |
|
Wheelbase |
60.8 in.
(1545mm) |
|
Rake / trail
|
29.5 degrees / 4.7 in.
(120mm) |
|
Brake, front
|
Hydraulic, dual disc, (2) 276mm
(10.87 in.) rotors with dual-piston calipers |
|
Brake, rear |
Rod-actuated
drum |
|
Wheel, front
|
Cast, 2.50 x
18 |
|
Wheel, rear |
Cast, 3.00 x
16 |
|
Tire, front |
MT 120/90 x 18 Dunlop Qualifier
F11 |
|
Tire, rear |
M140 x 16 Dunlop Qualifier
K127 |
|
Seat height |
31.2 in.
(792mm) |
|
Ground clearance
|
6.4 in.
(163mm) |
|
Fuel capacity, main / reserve
|
3.3 / 1.3 gal. (12.5 / 4.9
liters) |
|
Curb weight, full tank
|
573.5 lbs. (260.1
kg) |
|
Test weight |
733.5 lbs. (332.7
kg) |
|
Power source
|
Three-phase AC
generator |
|
Charge control
|
Solid
state |
|
Headlight beams, high / low
|
60 / 55
watts |
|
Tail / stop lights
|
(2) 8 / 27
watts |
|
Battery |
12 V 14
AH |
|
Includes: |
Speedometer, odometer,
tripmeter, tachometer, fuel gauge. Indicators for low oil pressure,
neutral, high beam and turn indicators |
|
Speedometer error
|
30mph indicated, actual
29.43 60mph indicated, actual 58.74 |
Specifications
|
Overall length
|
86.0 in. |
Wheel base |
59.3 in. |
|
Overall width
|
31.5 in. |
Ground clearance
|
5.5 in. |
|
Overall height
|
44.7 in. |
Dry weight |
463 lb. |
|
Seat height |
30.7 in. |
Curb weight |
498 lb. |
|
Footpeg height
|
12.6 in. |
Max weight capacity
|
364
lb. |
|
Frame type |
Double
cradle |
Fuel tank capacity
|
4.76 US gal (18
liters) |
|
Front suspension
|
Telescopic
fork |
Reserve capacity
|
0.79 US gal. (3.0
liters) |
|
Front wheel travel
|
5.5 in. |
Front Brake |
Hydraulic disc
brake |
|
Rear suspension
|
Swingarm |
Rear brake |
drum |
|
Rear wheel travel
|
4.3 in. |
Caster angle
|
29 ° |
|
Rear damper |
Dual spring &
shock |
Trail length
|
4.6
in. |
|
Bore & stroke
|
2.6 x 2.1 in. (67 x 53
mm) |
Lubrication system
|
Forced pressure & set
sump |
|
Displacement
|
45.6 cu-in.
(747cc) |
Oil pump type
|
Trochoid |
|
Compression ratio
|
9.3:1 |
Cooling system
|
Air
cooled |
|
Valve train |
DOHC chaindrive with rocker
arm |
Air filtration
|
Paper
filter |
|
Intake valve opens at
|
0 ° BTDC |
Oil filter |
Paper filter (Fram
PH6017A) |
|
Intake valve closes
|
35 ° ABDC |
Engine weight
|
179.2 lb. |
|
Exhaust valve opens
|
30 ° BBDC |
Firing order
|
1-2-4-3 |
|
Exhaust valve closes
|
-5 ° ATDC |
Cylinder arrangement
|
Inline 4
L1-2-3-4R |
|
Carburetor type
|
4 CV (constant
vacuum) |
Throttle bore
|
1.3 in.
(34mm) |
|
Clutch system
|
Multi-plate
wet |
Gear ratio 1st
|
3.00:1
(42/14) |
|
Clutch operation
|
manual |
Gear ratio 2nd
|
2.056:1
(37/18) |
|
Transmission
|
5 speed |
Gear ratio 3rd
|
1.545:1
(34/22) |
|
Primary reduction
|
1.780
(73/41) |
Gear ratio 4th
|
1.240:1
(31/25) |
|
Secondary/third reduction
|
N/A |