Without a repeat performance, and then a complete fill up, it'll be tough to tell.
I hate these kind of things.

moreland4 wrote:
SKWEARpeg wrote:
Just curious, are you running an inline filter?

Yes, a Pingle.

One question... is the Fuel line going below the manifold?

If so, that may be your problem.

I run the HSR42, stock petcock, a Yost power tube, a filter provided by Shane at SS Customs Cycles with the HSR42 kit and I have my fuel line *OVER* my manifold. Last year, the furthest I got with a trailer about 155 miles when my light came on... about another 3 miles I switched to reserve. I ended up at about 4.2 gallons total fill up at 165 miles.

I didn't drill out the vent tube, nor remove my rollover valve and my gas cap is not vented.

I think ~38 miles per gallon (GPS miles not odometer miles) is pretty dang good at 65MPH with a trailer.

I think my Yost power tube jet access extension might have something to do will it... making the bowl deeper. I don't know for sure about that, since it is just speculation.

Mine comes on, then I switch to reserve. Usually have around 35 miles or so before she's empty, but I find a gas station just as soon as I can.

gfolkert wrote:
One question... is the Fuel line going below the manifold?

If so, that may be your problem.

Nope, running filter and line above manifold also. Also running Yost Power Tube. On my last tank, I averaged 42 mpg (with fairing running 70-75 mph on the superslab).

I'm going to run this tank down and force a repeat performance if possible.

Your new petcock pickup should be the same height as the stock petcock
you remove, otherwise the pickup level changes.

Dave