Suzuki GW250 Service Manual page 110

3-62 ENGINE
CONROD BIG END SIDE CLEARANCE
• Inspect the conrod side clearance using a thickness gauge.
• If the clearance exceeds the limit, remove the conrod and
inspect the conrod big end width and the crank pin width.
• If the width exceed the limit, replace conrod or crankshaft.
 Conrod big end side clearance:
Service Limit: 0.30 mm (0.012 in)
 09900-20803: Thickness gauge
 Conrod big end width:
Standard: 19.95 – 20.00 mm (0.7854 – 0.7874 in)
 09900-20205: Micrometer (0 – 25 mm)
 Crank pin width:
Standard: 20.10 – 20.15 mm (0.7913 – 0.7933 in)
 09900-20605: Dial calipers (10 – 34 mm)
CONROD CRANK PIN BEARING INSPECTION
• Loosen the conrod cap bolts, and tap the conrod cap bolts
lightly with a plastic hammer to remove the conrod cap.
• Inspect the bearing surfaces for any sign of fusion, pitting,
burn, or flaws. If any, replace them with a specified set of
bearings.
CONROD CRANK PIN BEARING SELECTION
• Place the plastigage axially along the crank pin, avoiding the
oil hole, as shown.
 09900-22301: Plastigage (0.025 – 0.076 mm)