Jon,
This tank is the 250 (1AH) or the mini F2 as I called it. Mini was referring to the smaller cc.
The 1GA 250/350 bike has the offset tank cap as per below:
Fairly recognisable paint job, but the tank seems in good condition. A bit of filler here and there is starting to bubble but it feels solid elsewhere.
Apologies if I've managed to confuse you with the models. It's taken me 3 weeks to work out what I have.
I started thinking along the lines of pulling the 350 motor out of the F1 and moving it into the F2 seized bike. Then sell off all the bit on the F1 to see if I can recover my money.
Just seems a lot of work breaking a bike and posting bits and pieces off all day.
86 RZ250F restored. 84 RZ500 rebuild in progress, 73 CT3 in progress