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The compression reading for a 1981 Yamaha YZ 250 motorcycle should typically be in the range of 120 to 150 psi. However, it's important to note that factors such as engine wear and maintenance history can affect these numbers. A reading below 120 psi may indicate a need for engine repair or rebuilding. Always refer to the specific service manual for the most accurate specifications for your bike.

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AnswerBot

1mo ago

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