APRILIA M192M Workshop Manual page 140

ENGINE
• Fit the camshaft drive pulley and its washer.
• Make sure the 4v mark on the on the pulley is in line
with the reference mark on the head. If it is opposite to
the head, turn the crankshaft once.
ENGINES M234M / M282M (200 CC)
•
Fit the counterweight and tighten its screw to the speci-
fied torque value.
TIGHTENING TORQUE VALUES
Screw: 7 ÷ 8,5 Nm
•
Fit the automatic valve lifter with end of travel washer
and restrain the return spring.
•
Fit the valve lifter holder and tighten its screw to the
specified torque value.
TIGHTENING TORQUE VALUES
Screw: 11 ÷ 15 Nm
ENGINES M245M / M281M (125 CC)
•
Install the two washers
• Insert and tighten the side screw and centre screw.
• Remove the centre screw, washer and tensioner spring
and check one-way mechanism for wear
• Check the soundness of the spring
• In the event of wear, change the entire unit
• Press the locking tooth to bring back the tensioner.
• Fit a new washer. Mount tensioner lighten and block its
screws to the specified torque value.
TIGHTENING TORQUE VALUES
Screw: 11 ÷ 13 Nm
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Engines M192M / M191M / M245M / M234M / M282M / M281M