Engine
DATA
Specification Desc./Quantity
Type single-cylinder, four-stroke
Timing system single overhead camshaft chain driven on the left-
hand side, three-arm rocking levers set up with
threaded set screw
Bore x stroke 57 x 48.6 mm
Cubic capacity 124 cm³
Compression ratio 11.5 - 12.5 : 1
Air filter sponge, impregnated with mixture (50% petrol and
50% oil)
Starting system electric starter motor with freewheel
Lubrication with lobe pump (inside the crankcase) controlled
by a chain and double filter: mesh and paper
Fuel supply Unleaded petrol; depression carburettor, electric
pump or vacuum pump.
valve clearance intake: 0.10 mm - discharge: 0.15 mm
Engine idle speed 1,650±100 rpm
Max. speed 100 km/h
Transmission
TRANSMISSION
Specification Desc./Quantity
Transmission With automatic expandable pulley variator with tor-
que server, V belt, self-ventilating automatic cen-
trifugal dry clutch, gear reduction unit and trans-
mission housing with forced air circulation cooling.
Capacities
CAPACITY
Specification Desc./Quantity
Engine oil 1200 cm³
Rear hub oil Capacity ~ 150 cm³
Fuel tank capacity Tank capacity: ~12 l (approximate value)
Fuel reserve ~ 2.0 l (approximate value)
Cooling circuit Capacity: ~ 2.0 l
Electrical system
ELECTRICAL COMPONENTS
Specification Desc./Quantity
Ignition/advance Electronic, with inductive discharge and variable
advance with three-dimensional mapping
Spark plug NGK CR 8EB
Spark plug Champion RG 4 HC
Characteristics MP3 125
CHAR - 4
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