Cylinder Head, Cylinder And Piston; Cylinder Head; Cylinder; Piston - Suzuki RM 250 2003 Owner's Service Manual

CYLINDER HEAD, CYLINDER AND

PISTON

CYLINDER HEAD

• Remove the cylinder head. (!4-3)
• Remove carbon deposits from combustion chamber surface.
• Inspect for pinholes, cracks and other damage.

CYLINDER

• Remove the cylinder. (!4-3)
• Remove carbon deposits from the exhaust port and the
exhaust valve chamber A.
• Check for scratches and wear on the cylinder sleeve.
PISTON
• Remove the piston. (!4-4)
• Remove carbon deposits from the top surface of the piston.
• Check for scratches, cracks, and wear around the piston
bosses.
• Remove minor scuffs with #1 000 – #1 200 sand paper.
• Check piston ring wear. Remove carbon deposits from the
piston ring grooves.

EXHAUST VALVE

• Remove the exhaust valve. (!11-3)
• Remove carbon deposits from the exhaust valve 1, exhaust
side valves 2 and exhaust valve cams 3.
• Check for wear and damage.
NOTE:
If tar drops from the exhaust valve breather hose when the
motorcycle is parked, change engine oil brand because some
engine oil can accumulate tar in the exhaust valve chamber.
PERIODIC MAINTENANCE 2-15