Interesting....not getting email notification on replies. Anyway, I guess I could fill it with water and measure it out. I thought I would try any easy way first.

I plan on using a 160SX. I believe it is 18oz per min at full throttle. I would like to have 140oz but there is no way this main tank is 140. I would guess its around 100oz, just by looking at it. I will add another tank, but I need to see what size I need.