yesterday I went to a bike show in Carlisle Pa. The bike ran fine getting there, but getting home was a whole different story. As soon as I got on the interstate and got in the fast lane to pass the bike just started to act like it wasn't getting gas. It was surging and the speed dropped from around 70 to 45 real quick and eventually came to a stalled engine after about 3/4 mile of acting up. We let it set for a couple of minutes and it started up. a friend said if it starts to act up pull the choke and see if it helps. It acted up and I PULLED THE CHOKE and was able to get it up to 65 on level highway any hill would slow it down. I manage to make it home, I sat down started reading the forms here and this morning I pulled the tank took the diaphragm out of the petcock capped the vacuum line put it back together as a gravity fed and i still have the same problem, only able to go at 1/4 throttle. I also looked for the carb vacuum line to see if it was crushed. I only found a hose leading from between the carbs to the area of the RH air filter. it actually stopped behind the filter and not attached to anything. Does anybody have any clues? ALSO, IF IT IS IN MY NEUTRAL IT WILL REV FINE IT ONLY SEEMS TO ACT UP WHEN IN GEAR UNDER A LOAD. COULD IT BE SPARK PLUGS????