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I’m building a bike that I wish Honda would have done. The bike is a CRF450 chassis with a 400ex engine. Basically an XR400 with electric start. My question is, “How much oil does this motor pump out, up to the frame, in a given minute?” Short of just pulling the line off and starting the bike and watching to see how fast it can fill a quart bottle. Does anyone know? Reason for asking this question is because I’m building oil tanks in place of the wet frame that was found on the XR400 bikes. With the two tanks that I’m placing on the CRF450 frame in place of the radiators; I need to do a cross over from one tank to the other. I would like to run the bike with both tanks more or less full, in order to take advantage of the most cooling I can get. I just don’t want to starve the engine for oil waiting for one tank to fill up to a high cross over. On the other hand I don’t want a low cross over and lose out on the cooling ability of the tanks if they’re going to be mostly empty while the bike is running. Does anyone have a realistic idea on how to get a cross flow effect without taking forever to get oil to the return line? A few videos can be found of it on YouTube under “XR400AF” if you care to watch them and give me any ideas for oil line/tank. Thanks in advance for any help.