66638 Suzuki RM250P

CYLINDER. CYLINDER HEAD AND PISTON 4-5

CYLINDER. CYLINDER HEAD AND PISTON 4-5

DATA

Basa

INSPECTION

CYLINDER HEAD

♦    Remove carbon deposits from the cylinder head.

♦    Inspect the cylinder head for cracks around the spark pług hole.

♦    Inspect for cylinder head distortion with the thickness gauge.

Cylinder head distortion Service limit: 0.05 mm (0.002 in)

09900-20803: Thickness gauge

CYLINDER

♦    Remove the exhaust valve assembly. (C7M1 -3)

♦    Remove carbon deposits from the exhaust port.

♦    Inspect the cylinder for cracks and replace the cylinder if nec-essary.

♦    Inspect the cylinder borę for wear and scratches.

NOTĘ:

Chrome-plated cylinder borę can not be modified such as boting and honing.    . \ \ \

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Inspect for cylinder distortion with the thickness gauge.

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Cylinder distortion: Service limit: 0.05 mm (0 002 in) 09900-20803: Thickness gauge ^

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0353

* Measure the cylinder borę for wear with the cylinder gauge at 20 mm (0.79 in) from the top surface.

NOTĘ:

The cylinder borę must be measured perpendicular to the crank-shaft axis direction.

H Cylinder borę

Standard: 66.400 - 66.415 mm (2.6142 - 2.6148 in)

09900-20508: Cylinder gauge set (40 - 80 mm)

PISTON TO CYLINDER CLEARANCE

H Piston to cylinder clearance:

Standard: 0.045 - 0.055 mm (0.0018 - 0.0022 in) Service limit: 0.120 mm (0.0047 in)