Cutting out and power loss at higher speeds...

[Guest]

Soooo... On my gs 650, when i get over 40-45 mph i get drastic power loss and engine cutting out. BUT, it only happenswhen im getting low on fuel.... Twice ive filled the tank to the top and had no problem there after.

So my thoughts are either sediment in the bottom of the tank or a clogged vent hose???

does the tank even have a vent hose? I havent had a chance to look yet... Do either of these ideas seem right to you guys? Am i on the right track? Thoughts? Suggestions? Help???

[tom203]

Tank cap has vent hole. Your petcock might not flow enough fuel when tank approaches 1/4 - might be clogged petcock filter and/or gummed up petcock. Just get new petcock and eliminate it as potential problem for another 30+ years.
you need to head to Basscliff 's and catch up on maintenance before it catches you!

http://members.dslextreme.com/users/bikecliff/

[Steve]

Have you tried switching it to REServe?

Any chance you have an inline filter installed?

Stock airbox/exhaust or aftermarket items?

.

[Tiny]

Havent looked for an inline filter or at the airbox yet... The exhaust was cut off by the previous owner so its just straight pipes

[Tiny]

What would switchng it to reserve tell me?

[tom203]

The petcock has two internal outlets- one (ON) gets fuel from higher up in tank: the other (res)gets fuel from bottom of tank. The latter also supplies fuel to PRI spot on petcock. Fuel might flow better in this spot. Understand that stock petcock is vacuum operated in on and res positions .
Look inside airfilter box and make sure there is a filter element installed.

[Tiny]

Thanks Tom!

[Gsricky]

Hi there just letting you know I'm new to the forum and I know this a old thread
I've got a similar problem but mine just boogs out after I cruise at the same rpm for a couple of min then If I rev it a bit it runs smooth for a while it does not matter how full the tank is. I've tried every setting on the petcock same result and I've also replaced the in line filter
Any help is greatly appreciated


1983 suzuki gs750e

[bonanzadave]

Get rid of the filter all together, and try running it with the gas cap open in case the vent is clogged.

[posplayr]

If the vent is plugged you should find the plug. It will cause the tank to flow over in a hot garage ruining your paint.
I have always run inline filters and I need a pingle as the stock petcok would not flow sufficently.
I would look at low voltage to the coils and possible Ignition relay mod.

[Gsricky]

Thx I will give it a try