Yamaha XV16AL Service Manual page 10

FEATURES
Operation
1. When the starter switch is pushed, elec-
tricity is run to the decompression sole-
noid 1 causing it to push out the
decompression solenoid rod 2.
2. When the decompression solenoid rod is
pushed out, the decompression connec-
tor 3 moves the decompression levers
4 in the direction indicated by the
arrows, and then the levers push the
decompression rods 5 toward the cam-
shaft side.
3. The decompression cam 6 is pushed in
the direction indicated by the arrow, and
then the pin 7 raises the projection of
the decompression cam.
4. When the camshaft is rotated by the self-
timing motor, the exhaust valve lifters 8
are lifted by the pin just before top dead
center (TDC) and the exhaust valve push
rod 9 and valve rocker arms are oper-
ated. Thus, opening the exhaust valve
becomes easy.
5. When the engine starts and reaches a
specific engine speed the decompres-
sion solenoid is turned off and the
decompression system stops operating.
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GEN
INFO
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