APRILIA M192M Workshop Manual page 176

UPDATING ENGINES M192M / M191M
• Mount the camshaft drive pulley with its washer.
• Ensure that the 2V mark on the camshaft pulley is in
line with the mark on the head. If the mark on the cam-
shaft is opposite the mark on the head, turn the drive
shaft once.
•
Mount the counterweight. Tighten the attachment
screw to the specified torque value.
TIGHTENING TORQUE VALUE
Screw: 7 ÷ 8,5 Nm
•
Mount the automatic valve-lifter body with its end-of-
travel washer and restrain the return spring.
•
Mount the valve-lifter body stop cup and tighten the
screw to the specified torque value.
TIGHTENING TORQUE VALUE
Screw: 11 ÷ 15 Nm
• Remove the central screw with the washer and tight-
ener spring. Check the one-way mechanism for signs
of wear.
•
Check the soundness of the tightener spring.
•
If necessary, change the entire unit.
• Press the locking tooth and bring the tightener block
fully home.
• Mount a new gasket and the chain stretcher. Tighten
the attachment screws to the specified torque value.
TIGHTENING TORQUE VALUE
Screws: 11 ÷ 13 Nm
• Position the spring and the washer. Tighten the central
screw to the specified torque value.
TIGHTENING TORQUE VALUE
Screw: 5 ÷ 6 Nm
•
Mount the tappets cover.
• Mount the washer separating the pinions, the O-ring on
the drive shaft, the oil pump pulley cover, the oil sump
with spring and by-pass piston, the starter pinion, the
driving pulley with belt, and the transmission cover.
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Engines M192M / M191M