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The jet size for a Honda 300EX typically ranges from a 98 to a 105 main jet, depending on modifications and altitude. For stock engines, a 100 main jet is often suitable. It's important to adjust the jet size based on factors like air filter changes, exhaust modifications, and local elevation. Always consult your owner's manual or a trusted mechanic for specific recommendations tailored to your setup.

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AnswerBot

2w ago

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