CYLINDER, PISTON AND EXHAUST VALVE 6-9
• Fit the piston pin and bearing into the conrod small end and
inspect the play.
• Inspect the bearing for smooth movement.
PISTON RING AND PISTON REASSEMBLY
• Apply engine oil to the piston ring and piston ring groove.
• Fit the piston ring into the piston ring groove so the ring end
comes to the piston ring locating pin. (6-10)
• Apply engine oil to the piston pin and bearing.
• Fit the bearing to the conrod small end.
• Face the “O” mark A on the piston top to the exhaust port.
• Insert the piston pin 1 and install the piston pin circlip 2. Pis-
ton pin circlip end should face upside.
NOTE:
* Replace the piston pin circlip with a new one.
* Place cloth on the crankcase to prevent piston pin circlip from
dropping into the crankcase.
EXHAUST VALVE REASSEMBLY
• Apply engine oil to the exhaust valves (main and side) and
spacers.
• The taper side of main valve should face downward and the
stamped marks “L”, “R” on the side valves should match with
the stamped marks “L”, “R” on the cylinder.
“L”“L”
“R”
“R”
(White)(White)
(Yellow)(Yellow)
(White)(White)
“L”“L”
“R”
“R”
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