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ENGINE
4-stroke single cylinder.
Bore (in.) ...........................................
Stroke (in.) .........................................
Capacity (cu.in.) .................................
Compression ratio ...............................
VALVE GEAR
Single overhead camshaft, chain driven; 4 valves.
Valve angle in relation to cylinder:
INLET: 20°
EXHAUST: 20°
Valve timing with valve play of 0.004 in.
with cold engine:
INLET:
opens before T.D.C.: 50°
closes after B.D.C.: 77°
EXHAUST:
opens at b.B.D.C.89°
closes at a.T.D.C.: 40°
Gap with engine cold:
INLET: 0.004 in.
EXHAUST: 0.006 in.
FUEL FEED
Gravity.
Dry type air filter.
Carburettors:
Mikuni TMR 41
LUBRICATION
Reed system "R.A.L." (Reed Activated Lubrication) with oil pump.
COOLING
By fluid with double cooler.
IGNITION
Electronics with capacitive discharge and with variable spark advance by digital
control.
Spark plugs: NGK CR7EB or CHAMPION G59C (for sporting activity NGK C8E).
Plug gap: 0.023÷0.027 in.
N° 8000A2943 (09-03)
GENERAL
3.85
3.01
35.15
10:1
A.5
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