Royal Enfield Classic 350 Service Manual Page 146

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05-63
Check the piston pin for wear.
Measure outside dia of piston pin at
3 points.
ASSEMBLY
Locate the oil ring expander into the
oil ring groove.
Slide the bottom rail to the bottom of
the expander.
Slide top rail to the top of the
expander.
Place the second ring in piston
(Index mark “2 IP” facing upwards).
NOTE :
Second ring has a taper edge cross sec-
tion and is hard chrome plated.
NOTE : After installation, the ring should
rotate freely rotatable in the ring grooves.
Stagger piston rings end gap as
shown in Fig.
Locate the top ring (Index mark “1
IP” facing upwards).
NOTE : Top ring has rectangular cross
section with black colour (Nitride coat-
ing).
CAUTION : Ensure the open end of any
piston ring does not align with the pis-
ton pin boss.
EX IN
Locate the piston on the connecting
rod and insert the piston pin into
the piston.
Fit the circlips on either side and
ensure they are located properly in
the grooves.
NOTE : Carefully fix the piston pin clip
into the piston boss while covering Crank
case neck by shop towel / chamois cloth
as shown in Fig.
IN
EX
Engine Dismantling, Inspection & Assembly
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