86 Suzuki GS450 Vacuum and Ground problems......any advice will help

[pnwesside31]

First of all, thanks to all those who continually try to help me as a noob.....I actually got my bike running for a good week, and then the same problems started happening. It's definitely a Vacuum/Fuel Delivery issue. Both sets of carbs have been cleaned and looked at 3 different times by 3 different people, and they look great. I've replaced the petcock as well.

With that, when it's running, it runs great, and people say it could be timing, but I'm not sure if it would actually run that well if it was timing.

After all that, the problem that exists is that it doesn't pull fuel (or enough fuel) through the carbs to hold a good idle, or if I get it started, it doesn't pull fuel (or enough fuel) through the carbs to run smoothly.

On top of that, now I have draw that doesn't allow me to charge my battery properly. Where can I check for ground problems?

Anybody have any good advice

BTW, here's a pic of my little project...

[Nessism]

Did you adjust the valves?

[Steve]

Where are you located? I have looked though some of your previous posts with the ongoing theme of not being able to figure out where all the connections go on the carbs. What you need is some hands-on help, but we have no idea who might be close enough to help you.

.

[pnwesside31]

That would be awesome. I'm in the Portland, Oregon area. Anybody close by?

[tkent02]

Portland, lot of GSers there.

First of all there's no drawing fuel. It runs down hill from the tank to the carbs. That's all.
The vacuum is a separate line, and merely switches the petcock on. The vacuum does not pull fuel.

You could have a clogged tank vent, clogged fuel filter, kinked fuel line? Lots of other choices, these are common ones.


For the electrical problem, go here:

http://www.thegsresources.com/gs_garage.htm

And scroll down to "The Stator Papers"
Read it all. Do it all.

[pnwesside31]

Thanks. I'll check those before I even attempt to adjust the valves. Would you happen to know anyone in PDX

[Nessism]

Thanks. I'll check those before I even attempt to adjust the valves. Would you happen to know anyone in PDX

Even if the immediate problem is not the valves, you still need to adjust them or they will eventually burn.

[pnwesside31]

Thanks to everyone for the list of stuff to check for my fuel problems. Any advice on where I can start as far as checking for draws on the battery? What should I be looking for?

[Steve]

Here is what I just wrote to someone else that's having problems:

One quick way to start your troubleshooting is to pull the top three fuses in the fuse box.
Use your voltmeter across the fuse holders, see which one shows voltage.
This would at least limit your search to just one third of the wiring on the bike.

The top fuse feeds the headlight, tail light and instrument lights.
The second fuse feeds signals, which include turn signals, brake lights and horn.
The third fuse feeds the ignition system.

That should at least get you started.

.

[pnwesside31]

Update:

I checked my gas before I started doing everything you guys suggested, and noticed my gas was blue, which was the same as the coating used by the radiator shop to re-seal the tank. Long story short, they said the tank didn't dry properly, and they agreed to re-seal it. Until then, I think I'll just check the easy stuff, and as much as I can to make sure when I throw that tank back on. It will be ready.

[79 sh850]

Yee! Well at least you found out what the problem is. Did they tell you what the turnaround time would be?

I would clean that crap out of your carbs as soon as I possible since you never know what is in it and what effect it might have on the rubber parts, etc. At the very least, open the taps on the float bowls and drain what is already in there. If its going to take a while to get your tank back, consider setting up some sort of pup tank so that you can flush out the stuff that has gone into the engine (I have a tank from a lawnmower kicking around for situations like this).