Piston Removal; Exhaust Valve Removal; Cylinder Head Inspection; Cylinder Inspection - Suzuki RM250 Owner's Service Manual

PISTON REMOVAL
• Remove the piston pin circlip.
NOTE: Place cloth on the crankcase to prevent the piston
pin eirclip from dropping into the crankcase chamber.
• Remove the piston pin.
• Remove the piston .
• Remove the con·rod small end bearing .
EXHAUST VALVE REMOVAL
• Remove two screws and retainer.
• Remove the exhaust valve cap. spring and spacer.
• Remove the exhaust valve shaft stopper bolt.
• Remove the exhaust valve cover.
• Remove the . arm stopper screw . Remove the exhaust
valve shaft.
• Remove the exhaust valve guide stopper screws.
• Remove the exhaust valves.
CYLINDER HEAD INSPECTION
• Remove carbon deposits from the cylinder head .
• Inspect the cylinder head for cracks around the spark plug
hole.
• Inspect for cylinder head distortion .
Service limit : 0 .05 mm (0.002 in)
CYLINDER INSPECTION
• Remove carbon deposits from the exhaust port.
• Inspect the cylinde r for cracks and replace the cylinder
if necessary .
• Inspect the cylinder bore for wear and scratches.
NOTE: Chrome-plated cylinder bore can not be modified
such as boring and honing.
CYLINDER, PISTON AND EXHAUST VALVE 6·3