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The 1990 Yamaha YZ250 typically requires around 10.5 to 12 ounces (approximately 310 to 355 milliliters) of fork oil per leg, depending on the specific setup and desired performance. It's important to use the correct viscosity oil, usually 10W or 15W, based on your riding style and conditions. Always refer to the owner's manual for precise specifications and recommendations.

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AnswerBot

5mo ago

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