I was doing a check on my blue Dune buggy when I found out that the shutoff valve for the fuel tank was open. The person who had helped me get it ready for the winter had helped me bleed the brakes and shut off the fuel tank while I was doing some other things (we were in a rush I think).
It turned out he didn't notice the different rear brake setup I have vs. his standard bug setup; where I have disc brakes in the rear (no brakes in front) so there are 2 bleeding valves, one on the bottom of the breaks, which he did, and an upper bleed valve. Come the next trip I had no rear brakes which is how I noticed the problem.
Also, the valve for the fuel tank was open. The fuel tank is in the body where the rear seat would be (a big hole for the shutoff valve I use which is straight down, when open, and closed it is at 90-degrees. I don't really suggest this but it is done... the bigger hole is a safety thing incase of a spill or open valve for a long time period.
I reach in by the driver's side rear tire and pull the valve handle to 90-degrees, but he reached in from the passenger side (the last trip) and the valve was straight down and open. The valve he uses in his rail does not have the 90-degree limitation like mine so when he pulled the handle the valve felt like it had been closed. This is one of the reasons I use the 90-degree valve vs. the 180-degree valve.
For what it is worth.
Lee