Yamaha WR250FM service manual Last digit of pad Rounded value, Example

VALVE CLEARANCE INSPECTION AND ADJUSTMENT

NOTE:

INSP

ADJ

The thickness a of each pad is indicated in hundreths of millimeters on the pad upper surface.

•Round off the last digit of the installed pad number to the nearest increment.

Last digit of pad	Rounded value
number
0, 1 or 2	0
4, 5 or 6	5
8 or 9	10

EXAMPLE:

Installed pad number = 148

Rounded off value = 150

NOTE:

Pads can only be selected in 0.05 mm incre- ments.

•Locate the rounded-off value and the mea- sured valve clearance in the chart “PAD SELECTION TABLE”. The field where these two coordinates intersect shows the new pad number to use.

NOTE:

Use the new pad number only as a guide when verifying the valve clearance adjust- ment.

•Install the new pads 3 and the valve lifters

4.

NOTE:

•Apply the engine oil on the valve lifters.

•Apply the molybdenum disulfide oil on the valve stem ends.

•Valve lifter must turn smoothly when rotated with a finger.

•Be careful to reinstall valve lifters and pads in their original place.

•Install the camshafts (exhaust and intake). Refer to “CAMSHAFTS” section in the CHAPTER 4.

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