possible vent blockage???
I just bought this bike and it ran fine when i test drove it. after a while of riding it just lost power. Eventually after this happened a few times i noticed the transparent fuel filter had hardly any fuel in it. I started tracing this problem back and today I "disabled" the automatic fuel shut off so it flows freely when in the on position. I also fixed a fuel leak in the line. I was riding it around today at low speeds on gravel just to see if i fixed it. After about 20 miles I looked at the transparent fuel filter and saw that it was almost empty again. so I headed back home while it was still running fine. Once I got home I took it down some asphalt and opened it up because I was sure that once I did it would run out of fuel and cut out like usual. Sure as poop it did, but I could have ridden it around all day at 40mph and it would have never acted up ( maybe it would have but at low speeds i did not have any problems with it for 50 miles and I would get into the throttle a little bit to get it up to speed.) I experience fuel starvation after a while at speeds above 50mph and can experience them more rapidly if I am in the throttle a lot say 90mph or so. I have concluded from this that the fuel tank is not getting quick enough relief from pressure, which is obvious. At low speeds there must be at least a leak fast enough for the fuel to keep up with the motor, but once you open the throttle up and, according to my theory, create a negative pressure in the fuel tank so great that no matter how slow you drive I you still can not get enough fuel into the carbs. I allow it to sit open the tank and when I am off again it runs fine, but not for long , depending on how I drive it. I have eliminated the posibility of it being the automatic fuel shut off. How do I further narrow down my problem with the same lack of cost as my automatic fuel shut off delete. How does the pressure relief system work in this fuel tank? I hear talk of replacing the seal and making sure my relief line is not clogged, but what are some other possibilities? It can't be hard but I have little knowledge in this area.