Conrod Inspection; Piston Ring And Piston Reassembling; Exhaust Valve Reassembling - Suzuki RM250 Owner's Service Manual

6-6 CYLINDER, PISTDN AND EXHAUST VALVE
CON ROD INSPECTION
• Measure the conrad small end bore.
Service limit: 23.040 mm (0 .9071 in)
09900-20605 Dial gauge
• Fit the pist on pin and bearing into the conred small end
and check the play.
PISTON RING AND PISTON REASSEMBLING
• Apply engine oil to the piston ring and piston ring groove.
• Fit the piston ring into the piston ring groove so the piston
ring end comes to the piston ring locating pin.
• Apply engine oil to the piston pin and bearing.
• Fit the bearing to the conrad small end.
• Face the arrow mark on the piston top to the exhaust
port side and
fit
the piston.
• Fit the piston pin and piston pin circl ip. Piston pin circli p
end should face upside.
NOTE:
• Replace the piston pin circlip with a new one.
• Place cloth on the crankcase
tD
prevent piston pin cir-
clip from dropping into the crankcase chamber.
EXHAUST VALVE REASSEMBLING
• Apply engine oil to the exhaust valve and valve guide.
• Fit the sha1t to the exhaust va lves.
NOTE: Fit the shaft of long side to the right exhaust valve.
• Fit the exhaust valves into the cylinder.
• Tighten the exhaust valve guide stopper screws.
• Reassemble the exhaust valve shaft and arm stopper.
• Apply thread lock" 1303" and tighten the bolt.
Tightening torque: 5 N'm (0 .5 kg-m. 3 .8 Ib-ftl
• Fit the cover and tighten the screws.