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In a stock PW80, there is no need to mix oil with the fuel. The oil is injected into the carburetor throat by the oil pump. The factory ratio is estimated to be about 24:1, which is quite rich. On bikes with the oil pump disabled, ratios as lean as 40:1 have been tried with success. The optimum ratio will ultimately depend on the elevation and the jetting used There is an oil tank under the seat

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16y ago

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