Yamaha F100 [230/463] Crankshaft and piston connecting rod assy

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5-43

POWR

CRANKSHAFT AND PISTON/

CONNECTING ROD ASSY.

Measuring steps:

● Clean the bearings and bearing por-

tions of the connecting rod.

● Install the upper half of the bearing

into the connecting rod and the lower

half into the connecting rod cap.

● Put a piece of Plastigauge



onto the

crank pin in parallel to the crankshaft.

● Assemble the connecting rod onto the

crank pin.

● Apply engine oil onto the threads and

seat of the original connecting rod

bolts.

● Tighten the original bolts to the speci-

fied torque in two stages.

Bolt:

1st: 8 Nm (0.8 m • kg, 5.8 ft • lb)

2nd: 90˚

● Remove the connecting rod cap.

● Measure the width of the compressed

Plastigauge



on each crank pin.

CAUTION:

Install the bearings in their original posi-

tions. Incorrect oil clearance measure-

ments can lead to engine damage.

NOTE:

● Make sure the large, flat side a on the

connecting rod faces towards the fly-

wheel side.

● Do not move the crankshaft until the big-

end oil clearance measurement has been

completed.