This tank is from a mid 70's Honda CB125 and I think it's pretty cool. I'd hoped it would fit without too much hassle but the tank is made for a skinny single top tube frame, and the GSX has a triple top tube frame which is way too wide. I considered having a go at the frame so I could keep the tank as it is - nice and skinny, but serious frame mods like that mean stripping everything off and I want to get this done quickly, so I'm going to widen the tank to fit the frame.