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1990 KX80 Fuel Mixture

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What should i be mixing my gas to? I just installed a 1990 KX80 engine into an 87 frame and have not fired it up yet. Waiting for the newer cdi box to come in. Thanks

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What should i be mixing my gas to? I just installed a 1990 KX80 engine into an 87 frame and have not fired it up yet. Waiting for the newer cdi box to come in. Thanks

42:1 or 50:1. depending on how hard you will be on the engine. I race, and I am mixing 42:1

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