Cylinder Head, Cylinder And Piston; Exhaust Valve - Suzuki RM85 Owner's Service Manual

2-12 PERIODIC MAINTENANCE
CYLINDER HEAD, CYLINDER AND
PISTON
CYLINDER HEAD
• Remove the cylinder head. (6-3)
• Remove carbon deposits from the combustion chamber sur-
face.
• Inspect for pinholes, cracks and other damage.
CYLINDER
• Remove the cylinder. (6-3)
• Remove carbon deposits from the exhaust port.
• Check for scratches and wear on the cylinder sleeve.
PISTON
• Remove the piston. (6-4)
• 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 groove.

EXHAUST VALVE

• Remove the exhaust valve. (6-4)
• Remove carbon deposits from the exhaust valve and exhaust
valve guide.
• Check for wear and damage.
• Inspect the breather hose for clogging with tar. If clogging is
found, clean up it.
NOTE:
Using several brands of engine oil may cause tar to drip from the
breather hoses.