1991-2002 Nighthawk 750

Specifications


Dimensions
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
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.

Engine
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 (pleated)
Intake valve opens 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
Carburetor type 4 CV (constant vacuum) Throttle bore 1.3 in. (34mm)

Drive Train
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 Gear ratio 5th 1.074: 1 (29/ 27)
Final reduction 2.533 (38/ 15) Gearshift pattern 1-N-2-3-4-5

Oil
Engine Oil Capacity at draining 2.8 U. S. quarts (2.7 liters) Recommended Oil for various temperature ranges:
Engine Oil Capacity with filter change 3.1 U. S. quarts (3.0 liters) 32 F to >115 F SAE 20W-50
Oil pressure @ 176 F 90 psi @ 6,000 rpm 32 F to >110 F SAE 20W-40
Recommended Oil Honda 4-stroke oil or equivalent.
API SF or SG, SAE 10W-40
5 F to 110 F SAE 10W-40
5 F to 90 F SAE 10W-30

Wheels/ Tires/ Chain
Min front tire tread depth 0.06 in. (1.5mm) Drive chain slack 3/ 4 in. to 1-3/ 16 in. (20-30mm)
Min rear tire tread depth 0.08 in. (2.0mm) Drive chain size/ link:
Cold Tire pressure (up to 200 lb. load) front 33 psi
rear 33 psi
DID chain DID 525 V9/ 110
Cold Tire pressure (up to
max weight capacity)
front 33 psi
rear 41 psi
RK chain RK 525 SM4/ 110
Tire type, front Dunlop K505F Front tire size 110/ 80-18 58H
Tire type, rear Dunlop K505 Rear tire size 140/ 70-17 66H

Electrical
Alternator charging coil 0.4 -0.6 ohms Front turn signal/ running light 12 Volt, 32 & 3 CP
Alternator field coil 2.1 -2.6 ohms Rear turn signal/ light 12 Volt, 32 CP
Regulator / rectifier regulated
voltage/ amperage
13.0 -15.0 V/ below 0.5A/ 2,000 rpm Instrument lights 3 bulbs 12 Volt / 1.7 Watt
Battery capacity 12V @ 14 Ah Oil warning light 12 Volt @ 3 Watt
Normal Batt charging rate 1.4 A / 10h Side stand warning light 12 Volt, 3 Watt
Main fuse 30 A High beam indicator light 12 Volt, 3 Watt
Other fuses two 10 A, one 15 A Turn signal indicator light 12 Volt, 3.4 Watt
Headlight (high/ low beam) 12 Volt, 60/55 Watt Neutral indicator light 12 Volt, 3 Watt
Tail / brake light 12 Volt, 3 & 32 CP

Ignition System
Autolite Standard 4164 Ignition timing "F" mark 10 BTDC
Autolite Platinum MP4164 Advance Start 10 / 1,500 rpm
Standard NGK DPR 8EA-9 Advance Stop 33 / 4,000 rpm
High speed NGK DPR 9EA-9 Full advance 33 / 4,000 rpm
Standard Nippondenso X24EPR-U9 Ignition coil resistance:
High speed Nippondenso X27EPR-U9 primary at 68 F 2.6-3.2 ohms
Spark Plug gap 0.03-0.04 in. (0.8-0.9mm) secondary with plug cap 18-22 kohms
Ign. pulse gen. resistance 297 -363 ohms secondary without plug cap 13-17 kohms

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