So I bought a 3.1 gal. desert tank for my 07 YZ 450 last year. It's an Acerbis clear tank and I like it because there's no need to stop to check fuel level and it holds quite a bit more fuel than my stock tank. The tank extends far forward and has two bolt holes on either side to bolt to the radiator supports, so it takes place of the plastic shrouds with a stock set-up. With the forward extension there is a small problem... there's about a quarter of a gallon worth of fuel that I can't even access (unless I'm riding a wheelie) because it sits below the petcock. So I removed the petcock and did a little modification and ran two vinyl lines to reach the deep reaches of the tank. My question is will I be able to draw the remaining fuel up and then down to the carburetor. Some people think that because this is gravity feed that it won't work. I wonder if there's enough vacuum to make this work like i think it should. If anyone has anything to add, please do. I guess I could always find out through trial and error.