78 GS 750 problems

[daffej]

Hi I bought a 78 gs 750 about 2 months ago got it running and was having a blast on it. Until I found a huge puddle of gas around the bike. Im guessing its the petcock. Do these go out a lot in these bikes? I filled up and drove for awhile thinking that once the bike is running it shouldnt leak. I stopped once and when I went to start it again it didnt seem like all the cylinders were firing. It was back firing every 5 seconds and couldnt go over 45mph. I didnt want to drive it like that but had no choice. Is this because of the petcock or is this something else.

Thanks for any suggestions.

Jeff

[cvmgtwowheels]

Sounds like a couple of problems petcock and stuck floats in one or more carbs.

[robertbarr]

This is still a rough draft, but:

http://www.cycleorings.com/petcock.html

[daffej]

Thanks for the advice. Hope I can figure out the problem/problems and get her back on the road asap.