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Sym JET 4 R 50 Series - Page 138

Sym JET 4 R 50 Series
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6. Cylinder Head/Cylinder/Piston
6-9
Lubricate cylinder and piston with two-stroke
engine oil.
Hold the piston and then install it into cylinder.
Caution
To avoid to damaging the piston and the
cylinder sliding surface.
Install the cylinder head.
Tighten torque: 1.6~2.0kgf-m
Replace the exhaust pipe washer with new one
and then install exhaust pipe.
Tighten exhaust pipe connection nut.
Tighten torque: 0.8~1.2kgf-m
Tighten exhaust pipe mounting bolt.
Tighten torque: 2.4~3.0kgf-m
Install the removed parts in the reverse order of
removal procedures.
Inspect following item after installation.
Test engine compression pressure.
Check for engine noise.
4 bolts
3 bolts
Connection nut
Lock pin

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