Suzuki FA50 Service Manual page 11

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REED VALVE
A reed valve is used in the intake system. The reed valve has thin, flexible steel pieces and are
fitted into the top of the cran kcase.
crankcase alternately changes to negative and positive, thus causing the reed valve to open and
close. The reed valve timing and opening vary depending on the engine speed and throttle
opening. I n other words, it can be said that the intake timing is idea l l y matched to the operating
condition of the engine.
R eed valve
E N G I N E LUBRICATION
Engine oil is supplied by means of an oil pump which is driven by the crankshaft through the
oil pump driven shaft and oil pump drive gear mounted on the crankshaft. Engine oil i s discharged
from the pump according to the engine speed.
As the p iston moves up and down, the pressure in the
- O i l pump
O i l pump driven gear
0
O i l tank