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I am doing some research on the same thing and have found no direct answers as this bike was manufactured with a mix pump that automatically mixed the oil to a ratio that varied with the engine speed. (Leaner=slower & richer=faster) The popular consensus on the dozens of discussions I have viewed is to mix the oil between 32:1 and 40:1 . Hope this helps you. GT

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16y ago

What else can I help you with?