Cylinder Head, Cylinder Aand Piston; Exhaust Valve; Exhaust Silencer; Silencer Inspection And Replacement - Suzuki RM250 Owner's Service Manual

CYLINDER HEAD. CYLINDER AND PISTDN
Cylinder Head
• Remove the cylinder head.
(c:r
6-2)
• Remove carbon deposits from combustion chamber
surface.
• Inspect for pinholes, cracks and other damage.
Cylinder
• Remove the cylinder. ( c:r 6-2)
• Remove carbon deposits from the exhaust port and the
exhaust va lve chamber.
• Check for scratches and wear on the cylinder sleeve.
Piston
• Remove the piston. (
c::r
6 -2)
• Remove carbon deposits from the t op surface of the
piston.
• Check for scratches, cracks, and wear around the piston
bosses.
• Remove minor scu ffs w ith # 1 000 - # 1 200 sand paper.
• Check piston ring wea r. Remove ca rbon deposits from the
piston ring groove.
EXHAUST VALVE
• Remove the exhaust valve. (
CT
6-3)
• Remove carbon deposits from the exhaust valve and ex·
haust valve guide.
• Check for wear and damage .
EXHAUST SILENCER
Silencer In spection and Replacement
• Remove the seat and the right frame cover.
• Remove three bolts and extract the black frontal part from
the alum inum case.
• Check if the glasswool sil encer is clogged with carbon
deposit or tar.
• Replace the glass wool silencer with new one if necessary.
PERIDDIC MAINTENANCE 2·8