Well I finally got my GS500 running today  I bought the bike from a guy and it took him forever to get it started when I went to get it. I brought the bike home and started looking at reasons why it would be so hard to start. The vacuum plugs on the carbs were both capped off so I assumed this would be the reason for it being hard to start, I also swapped the petcock at the same time(which was a terrible idea) because I thought this may have something to do with the hard starting as well. Anyways, I ended up fixing the vacuum lines, rebuilt the carbs and went to start the bike. The bike ended up pouring gas into the airbox and I had non idea why. I had all my lines routed properly and I couldn't figure out what the problem was. Anyways today a buddy came over and we were looking the bike over, he asked me if I had a spare petcock from my parts bike and I said ya, so he went and got it, took it apart and started looking at it. He said I bet you've got a rip in the gasket of that petcock. So off came the lines, off came the petcock and what do ya know, there wasn't a gasket or spring inside haha. So I put the good petcock on and voila, bike fired right up. I'm pretty happy it works now lol, gotta do some fine adjustments on it, I think the slides are gummed up cause it tends to hang on rpm's sometimes and Its got a brand new cable which isn't catching on anything. So if you ever get gas into your air box, check your petcock hahah

Andrew

haha don't you just love those little things...  Glad it's running