900 L4-2118cc 2.1L DOHC (1992)
specified checking values, adjustment must be made to the valve stem or the valve seat:
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If the value is lower than the minimum value, the length of the valve must be reduced.
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If the value is greater than the maximum value, the valve seat must be milled.
The nominal value for adjusting the position of the valve is 20.2 mm (0.795 in).