syphon it back out with a 3-4 foot long piece of clear petrol proof pipe pushed through the tanks filler hole into the bottom of the tank and a petrol can at a lower level than the bikes tank, it helps to use a funnel in the petrol can as fuel sprays everywhere before you can get the end of the pipe into the can- believe me! using clear pipe you can see the petrol coming along the pipe.
Perry, January 2013