These are the known mechanical and performance specifications for your 1983 Honda VT 750 C Shadow.
Basic Specs

Engine
Displacement749.50 ccm (45.73 cubic inches)
Type
DetailsV2, four-stroke
Max RPM
Compression9.8:1
Bore/Stroke79.0 x 75.5 mm (3.1 x 3.0 inches)
Valves/Cylinder3
FuelingCarburettor. Dual Carb
IgnitionElectronic
ExhaustDouble Stainless Steel Pipes
Lubrication
CoolingLiquid
Drivetrain
Gearbox6-speed
Final DriveShaft drive (cardan)
ClutchSprague
Driveline
Fuel Economy & Polution
Fuel Consumption
Fuel Capacity12.50 litres (3.30 gallons)
Emissions
Chassis
Frame Type
Rake57.0°
Trail139 mm (5.5 inches)
Front Suspension
Front Travel
Rear Suspension
Rear Travel
Seat
Seat Height
Alt. Seat Height
Total Height1,199 mm (47.2 inches)
Total Length2,192 mm (86.3 inches)
Total Width861 mm (33.9 inches)
Ground Clearance150 mm (5.9 inches)
Wheelbase1,524 mm (60.0 inches)
Dry Weight210.9 kg (465.0 pounds)
Wet Weight
Wheels & Brakes
Front Tire/Tyre110/90-19 62H
Rear Tire/Tyre140/90-15 70H
Front BrakesDouble disc
Front Brake Diameter
Rear BrakesExpanding brake (drum brake)
Rear Brake Diameter
Wheels
Comments
This is the grandfather of all ´Shadow´ bikes today. Honda introduced many new ideas on this bike, but the biggest change was the style. The low seat, swept back lines, the extended forks, teardrop tank, all lent to a look that is still going strong in the Shadow of today. This was the first purpose built cruiser. The engine had a unique offset dual-pin crankshaft that achived perfect primary balance. The Sprague (one way) clutch allowed slight slip one way to elliminate wheel chatter when down-shifting at high RPM. This bike was the debut of the three valve, twin plug head also. Hydraulic valve adjusters, electronic ignition, cam chain tensioners, hydraulically actuated clutch and front brakes, brushless generator, shaft drive, all were things that Honda added to make this new bike low maintenance for the rider. If you want to ride, not tinker, the Shadow is the bike for you.