These are the known mechanical and performance specifications for your 1975 Harley-Davidson XLCH 1000 Sportster.
Basic Specs

Engine
Displacement1000.00 ccm (61.02 cubic inches)
Type
DetailsV2, four-stroke
Max RPM
Compression9.0:1
Bore/Stroke81.0 x 96.8 mm (3.2 x 3.8 inches)
Valves/Cylinder2
FuelingCarburettor. Bendix 16P12
IgnitionPoints
Exhaust
LubricationForce-Feed (Pressure) Oil pump.
CoolingAir
Performance
Horespower61.00 HP (44.5 kW)
Torque70.51 Nm (7.2 kgf-m or 52.0 ft.lbs)
Top Speed
Fuel Economy & Polution
Fuel Consumption4.70 litres/100 km (21.3 km/l or 50.05 mpg)
Fuel Capacity8.32 litres (2.20 gallons)
Emissions109.0 CO2 g/km. (CO2 - Carbon dioxide emission)
Chassis
Frame Type
Rake29.6°
Trail
Front Suspension
Front Travel
Rear Suspension
Rear Travel
Seat
Seat Height
Alt. Seat Height
Total Height1,067 mm (42.0 inches)
Total Length2,216 mm (87.3 inches)
Total Width813 mm (32.0 inches)
Ground Clearance184 mm (7.3 inches)
Wheelbase1,486 mm (58.5 inches)
Dry Weight
Wet Weight
Wheels & Brakes
Front Tire/TyreMJ90-19
Rear Tire/TyreMN90-18
Front BrakesSingle disc
Front Brake Diameter
Rear BrakesExpanding brake (drum brake)
Rear Brake Diameter
Wheels
Comments
Last year of the right side shift.