Starving for Gas during CarbSync?

[1948man]

I have studied the tutorials for syncing the carbs an done them several times. I decided to check them today since I recently had them off (adjusting floats). They were close enough (sync) but about as soon as I warmed up the bike and hooked things up and checked the sync, the bike died and didn't want to restart. This has happened in the past when I sync. When I unhooked the Carbtune and refitted the sync port plugs etc and put the tank back on, the bike ran fine. It seems something about my sync setup is not working adequately. I put my tank about where my seat would normally be and don't have to disconnect the fuel line. I have a way to securely mount a little piece of plywood in the seat area to form a little platform for the tank to sit on. I disconnect the vacuum line from #2 carb area to petcock and plug the line with a golf tee (still connected to the carbs with petcock end plugged). Then, of course, I connect the lines from the Carbtune to the ports. Is there anything wrong with my setup? I guess I could try doing the sync with the petcock on Prime to see if that made any difference.

[rustybronco]

I disconnect the vacuum line from #2 carb area to petcock and plug the line with a golf tee (still connected to the carbs with petcock end plugged). Then, of course, I connect the lines from the Carbtune to the ports. Is there anything wrong with my setup? I guess I could try doing the sync with the petcock on Prime to see if that made any difference.

If you disconnect the vacuum line off of either the #2 port or the petcock, you'll need to turn the petcock to prime.

[1948man]

Thanks Rusty, I'll know next time. If I just kept the vacuum line connected (I have a way to adapt an extension to make it long enough) my understanding is the Carbtune wouldn't work right. Is that right?

[1948man]

Okay, it's making since now. If you use a remote tank like in BassCliff's tutorial, it's gravity feed and no vacuum is required to get fuel to flow. Putting the tank on Prime mimics the gravity freed of the remote tank.

[rustybronco]

If I just kept the vacuum line connected (I have a way to adapt an extension to make it long enough) my understanding is the Carbtune wouldn't work right. Is that right?

Incorrect... it will work just fine.

[1948man]

I'll figure it all in a yr or two. At any rate, you have given me enough info so that a carb sync should be no problem.