These are the known mechanical and performance specifications for your 2018 BMW C Evolution.
Basic Specs

Engine
Displacement
TypeDrive train swing arm with liquid-cooled alternator; permanently excited synchronous machine with surface magnets, internal rotor
DetailsElectric
Max RPM
Compression
Bore/Stroke
Valves/Cylinder
Fueling
Ignition
Exhaust
Lubrication
CoolingLiquid
Performance
Horespower48.00 HP (35.0 kW)
Torque72.00 Nm (7.3 kgf-m or 53.1 ft.lbs)
Top Speed129.0 km/h (80.2 mph)
Chassis
Frame TypeHybrid chassis with die-cast aluminium load-bearing battery casing, bolt-on tubular-steel stearing head carrier and rear frame
Rake24.1°
Trail95 mm (3.7 inches)
Front SuspensionUpside-down fork, 40 mm
Front Travel120 mm (4.7 inches)
Rear SuspensionSingle-sided swing arm with direct-link spring strut, spring pre-load manually adjustable over 7 settings
Rear Travel115 mm (4.5 inches)
Seat
Seat Height765 mm (30.1 inches) If adjustable, lowest setting.
Alt. Seat Height
Total Height1,255 mm (49.4 inches)
Total Length2,190 mm (86.2 inches)
Total Width947 mm (37.3 inches)
Ground Clearance
Wheelbase1,610 mm (63.4 inches)
Dry Weight275.0 kg (606.3 pounds)
Wet Weight
Wheels & Brakes
Front Tire/Tyre120/70-R15
Rear Tire/Tyre160/60-R15
Front BrakesDouble disc. ABS. Floating discs. Two-piston calipers.
Front Brake Diameter270 mm (10.6 inches)
Rear BrakesSingle disc. ABS. Floating disc. Two-piston calipers.
Rear Brake Diameter270 mm (10.6 inches)
WheelsCast aluminum
Comments
8 kWh lithium-ion battery. (3 modules, twelve 60 Ah cells per module. Range 162 km. Windscreen.