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I come home yesterday after filling up with fuel and park my bike in its normal spot. I return to it minutes later to lube the chain and move it back 1 meter and put it back on its side stand. Once I did this I noticed that approximately an 1/8 to a 1/4 litre of fuel drains out the bottom of my speedy through what appears to be some sort of drain.

Is this normal??? Did I happen to over fill the tank and this is a safety mechanism resulting from expanding fuel in an over filled tank??? I did have the bike in for an oil change a few days earlier. Did they forget to replace a plug? Any input would be greatly appreciated.

Thanks,
Ceuls