Kawasaki GPX250R (1987) [117/248] 10 crankshaft transmission

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8 10 CRANKSHAFT TRANSMISSION Apply engine ail to the main bearing inserts Connecting Rod Removal Remove the crankshaft Make and record the locations of the connecting rods and their big end caps so that they can be reassembled in their original positions Remove the connecting rod big end cap nuts and take off the connecting rod and cap with the bearing inserts If the connecting rods or bearing inserts are replaced with new ones check clearance with plastigage before assembling engine to be sure the correcting bearing inserts are installed Apply engine oil to the bearing inserts Crankshaft Connecting Rod Cleaning After removing the connecting rods from the crank shaft wash them with a high flash point solvent Blow the crankshaft oil passage with compressed air to remove any foreign particles or residue that may have accumulated in the passages Connecting Rod Bend A Connecting Rod C Bearing Inserts B Big End Cap CAUTION 0T0 prevent damage to the crankpin surfaces do not allow the big end cap bolts to hit them Measure connecting rod bend oRemove the connecting rod big end bearing inserts and reinstall the connecting rod big end cap cSelect an arbor of the same diameter as the connecting rod big end and insert the arbor through the con necting rod big end QSelect an arbor of the same diameter as the piston pin and at least 100 mm long and insert the arbor through the connecting rod small end oOn a surface plate set the big end arbor on V blocks oWith the connecting rod held vertically use a height gauge to measure the difference in the height of the arbor above the surface plate over a 100 mm length to determine the amount of connecting rod bend If connecting rod bend exceeds the service limit the connecting rod must be replaced Connecting Rod Installation Notes To minimize vibration a pair of connecting rods should have the same weight mark The weight mark is indicated by a capital letter and is stamped on the connecting rod big end Weight Mark Location 1 Big End Cap 2 Connecting Rod 3 Weight Mark Alphabet Connecting Rod Bend Service Limit 0 2 100 mm Connecting Rod Bend Measurement

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