Engine bogging down after some freeway riding

[patrickr1984]

Hey folks,

I went for a canoeing trip with my buddy, and I used my 06' GS500 has the take-out vehicle. On the way to the river, after about 30 minutes on the bike and 30 miles of road, the engine started bogging down. It wouldn't go over 65 MPH, and rapidly got worse from there. It began acting like it was running out of gas (i.e. revving high, but losing speed and power and the same time). I got on the next exit immediately and as I was pulling off, the engine died completely. I rolled into a fortunately placed gas station, turned the bike off, and scratched my head for a bit. I checked the petcock, fuel lines, and gas level. Everything checked out, so I started her back up and was able to run the remaining distance with no problem.

On the way back from out trip the same thing happened. After about 30 miles, it started bogging down, revving high, and after a mile or so, shut off completely. Again, I was able to just turn it back on and travel home with no further issues.

Some quick notes: I've cleaned the jets within the last 3k miles, but I haven't done a full rebuild and I don't know if one was ever done as I bought it second hand.

Help, thoughts, criticisms, anything is appreciated. Thanks guys!

[MAGS500F]

My bike have the same exact problem.
After riding it about 30 miles(steady 70-75MPH) it would get stuck at around 60-65MPH and it wouldn't go any higher and it would keep bogging like running out of gas.
But once you pull over and stopped you can fire it right up with no problem and it rides fine after that.
I wonder if anyone have any answer to this.

Thanks

[78530i]

+1 I have replaced fuel lines. It does this in Prime, Reserve, and On. Somebody please help.

[HPP8140]

float height, petcock blockage, tank vent