125 ENGINE SPECIFICATIONS
Type Single-cylinder, 4-stroke
Engine capacity 124 cm³
Bore x stroke 57.0 x 48.6 mm
Compression ratio 10.6 ± 0.5: 1
Engine idle speed 1650 ± 100 rpm
Timing system 2 valves, single overhead
camshaft, chain-driven.
Valve clearance Intake: 0.10 mm Exhaust: 0.15 mm
Max. power 7.7 kW at 8,250 rpm
MAX. torque 9.6 Nm at 7,250 rpm
Transmission CVT expandable pulley variator
with torque server, V-belt, self-
ventilating dry automatic
centrifugal clutch and transmission
housing with forced-circulation air
cooling.
Final reduction gear Gear reduction unit in oil bath.
Lubrication Engine lubrication with lobe pump
(inside crankcase), chain-driven,
with double filter: mesh and paper.
Cooling Forced-air circulation cooling.
Electric starter
Ignition Capacitive discharge ignition, with
variable advance and separate HV
coil.
91
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