BMW C1 Repair Manual page 83

11
Technical Data
Engine, general
Type
Engine number
Number of cylinders
Stroke
Cylinder bore
Displacement
Compression ratio
Power output
Max. torque
Idle speed
Rated engine speed
Max. engine speed
Crankshaft (main) bearings
Direction of rotation
Cylinder
Piston
Lubrication system
Engine lubrication
Oil filter
Oil pump
Oil capacity
Initial filling
Oil change with filter
Min. capacity
Oil grades
Winter operation
Oil pressure:
(idle)
7,500 rpm
C 1
Single-cylinder four-stroke, double overhead
camshafts driven by roller chain, 4 valves operat-
ed by bucket tappets, liquid-cooled cylinder and
cylinder head, integral water pump, automatic
transmission.
1 cylinder, four-stroke
Variator housing output shaft
1
mm (in) 50 (1.97)
mm (in) 56,4 (2.2205)
3
cm (cc) 125
:1 13.0 ± 0.3
kW (hp) 11 (15)
at 9.250 rpm
Nm 12
at 6,500 rpm
-1
min 1,900
(rpm)
-1
min 9,250
(rpm)
-1
min 10,400
(rpm)
Plain bearing
Clockwise, looking at ignition system
Light alloy, "Nikasil" coated
Smooth-skirt piston
Pressurised oil circuit
Full-flow type
Eaton pump
l 1
(Imp. (1.76/1.05)
pint/
US quart) 1
l (1.76/1.05)
(Imp.
pint/ 0.8
US quart) (1.41/0.85)
l
(Imp.
pint/
US quart)
15W40
5W-40
bar (psi)
≥ 0.5 (7.11)
bar (psi)
(oil temperature
80 °C/176 °F)
bar (psi) 3 (42.69)
11.5