Piston; Piston Diameter - Suzuki GW250 Service Manual

CYLINDER BORE
• Measure the cylinder bore diameter at six places.
• If any one of the measurements exceed the limit, overhaul the
cylinder and replace the piston with an oversize piston, or
replace the cylinder.
 Cylinder bore:
Service Limit: 53.590 mm (2.1098 in)
 09900-20530: Cylinder gauge set

PISTON

PISTON DIAMETER

• Using a micrometer, measure the piston outside diameter at
10 mm (0.4 in) A from the piston skirt end.
• If the measurement is less than the limit, replace the piston.
 Piston diameter:
Service Limit:
Piston oversize: 0.5 mm
 09900-20203: Micrometer (50 – 75 mm)
PISTON-TO-CYLINDER CLEARANCE
• Subtract the piston diameter from the cylinder bore diameter.
• If the piston-to-cylinder clearance exceeds the service limit,
rebore the cylinder and use an oversize piston or replace both
the cylinder and the piston.
 Piston-to-cylinder clearance:
Service Limit: 0.120 mm (0.0047 in)
53.380 mm (2.1016 in)
at 10 mm (0.4 in) from the skirt end
ENGINE 3-37