When you fill up, put the nozzle in all the way with your hand over the storage bucket. Fill slowly until the gas shuts or clicks off. That's it your done. It should now be full. This works on the GT and LX150 every time for us. When I first got the GT I was filling it with my hand over the side of the scooter. No good. With my hand over the bucket, it worked every time with no overflow.
Hope this helps,
I've updated this thread since it's getting attention again to put the picture right up front... again, if you fill up from this angle (or if you don't have a top case in the way from behind) it should work....
Last edited by DougandMichelle on Sat Jan 06, 2007 3:05 pm; edited 4 times in total