Specs from the 1982 Honda Brochure
Engine Type Three valve, Vertical Twin, OHC
Displacement 447 CC
Bore & Stroke 75 x 50.6 mm
Compression Ratio 9.1:1
Carburation Two, 33 mm, CV Type
Transmission Six Speed, Constant Mesh
Exhaust System Two-into-Two with Power Chamber
Clutch Wet, Multi-Plate
Brakes Front: Slotted Disc, Double Piston Caliper
Rear: Drum
Suspension Front: Air Assisted, Telescopic. Rear: Swing Arm
Tire Size Front: 3.60 S19. Rear: 4.10 S18
Wheels Reversed Spoke Comstar
Ignition System C.D.I.
Starting System Electric
Gas Type Regular
Wheelbase 1390 mm (54.7 in.)
Dry Weight 171 Kg. (376.9 lbs.)
Overall Length 2085 mm (82.1 in.)
Overall Width 805 mm (31.7 in.)
Seat Height 790 mm (31.1 in.)
Fuel Capacity 13 litres (2.86 imp. gal.) (3.43 US gal.)
Colors Black or Silver Metallic

Specs from the Clymer Manual
Make & Model Honda CB450T Hawk
Years 1982
Tires
Front Tire 3.60 x 19
Front Tire Pressure 28 psi, 2.0 kg/sq. cm
Rear Tire 4.10 x 18
Rear Tire Pressure 28 psi, 2.0 kg/sq. cm - up to 206 lbs.
36 psi, 2.5 kg/sq. cm - up to vehicle load limit
Replacement Light Bulbs
Headlight 12V 50/35W
Tail/Brakelight SAE 1157
Front Directional Light SAE 1034
Rear Directional Light SAE 1073
Instrument Lights SAE 57
Maintenance & Tune-Up Torque Specs
Oil filter cover bolt 29-31 N-m, 21-22 ft.-lb.
Oil drain bolt 25-35 N-m, 18-25 ft.-lb.
Fork cap bolt 15-30 N-m, 11-22 ft.-lb. (air assist models)
Fork bridge bolts Upper - 9-13 N-m, 7-9 ft.-lb.
Lower - 18-25 N-m, 13-18 ft.-lb.
Front fork
interconnecting
air hose
Air connector-to-fork cap bolt and Air hose-to-fork cap bolt, 4-7 N-m, 3-5 ft.-lb.
Air hose-to-connector, 15-20 N-m, 11-14 ft.-lb.
Handlebar holder bolts 18-25 N-m, 13-18 ft.-lb.
Rear axle nut 68-100 N-m, 50-72 ft.-lb.
Fuel strainer cup 3-5 N-m, 2-4 ft.-lb. (models so equipped)
Balancer chain 8 mm adjust nut - 20-24 N-m, 15-18 ft.-lb.
Adjuster plate 8 mm nut  - 20-24 N-m, 15-18 ft.-lb.
10 mm nut - 30-35 N-m, 22-25 ft.-lb.
Cylinder head bolts 30-35 N-m, 22-25 ft.-lb.
Tune-Up Specs
Valve Clearance 0.08 - 0.12 mm (0.003 - 0.005 in.) - Intake
0.12 - 0.16 mm (0.005 - 0.006 in.) - Exhaust
Compression Pressure 1,172 - 1,368 kPa (171 - 199 psi)
Spark Plug Type ND X24ESR-U or NGK DR8ES-L
Spark Plug Gap 0.8 - 0.9 mm (0.032 - 0.036 in.)
Idle Speed 1,200, + or - 100 rpm
Oil Capacity
Engine Oil 2.6 U.S. qt., 2.5 liter - Oil drain
3.2 U.S. qt., 3.0 liter - Rebuild
Front Fork Oil 172 cc, 5.8 fluid oz.
Drive Chain
Chain Type 530 x 100
Chain Replacement Number DID 50DS-100L or RK 50KS-100L
Front Sprocket 16T
Rear Sprocket 36T
Battery YB12A-A
click for manual information Clymer Manual for the CB450T Hawk

Honda 400-450cc Twins, 1978-1987
Service, Repair & Maintenance

Tune-up and routine maintenance
Engine, clutch and transmission
Fuel and exhaust, Ignition system
Steering and suspension
Wheels, brakes and tires
Frame and body
Electrical system, Wiring Diagrams