Need help guys all info here..........

[Wrenchhead]

Ok, so heres a theory. Seems lean is the scenerio we are favoring, possible lean conditon caused by poor fuel flow???

[mcloud]

Ok, so heres a theory. Seems lean is the scenerio we are favoring, possible lean conditon caused by poor fuel flow???

Did you try it with petcock on prime?

[Wrenchhead]

Is there a prime/on setting on it? It looked like a vacuum petcock.

[Larry D]

Ok, so heres a theory. Seems lean is the scenerio we are favoring, possible lean conditon caused by poor fuel flow???

Get your coils straightened out first. Putting a new air filter in will help with the leaness. Then go from there. Without the coils right, you'll chase your tail.

[Wrenchhead]

Does that sound right with the coils though? I believe it is not fully burning the mixture because the spark timing is off which an incomplete burn would result in a "rich" spark plug reading and or symptom. But up to when it actually gets there the spark timing increases.

[BassCliff]

Greetings and Salutations!!

Hi Mr. Wrenchhead,

Sorry I'm late to the party. Let me roll out the welcome mat. Pay particular attention to the "Top 10 Common Issues".

Please click here for your mega-welcome, chock full of tips, suggestions, links to vendors, and other information. Then feel free to visit my little BikeCliff website where I've been collecting the wisdom of this generous community. Don't forget, we like pictures! Not you, your bike!

Thanks for joining us. Keep us informed. All the best to you and yours.

Thank you for your indulgence,

BassCliff

[Wrenchhead]

Is it possible to have the auto-shut off type petcock stuck partly shut or no creating enough vacuum to open it fully??

[Dave8338]

Is it possible to have the auto-shut off type petcock stuck partly shut or no creating enough vacuum to open it fully??

Anything is "possible".

Pull the fuel line from the fuel rail.
Pull the vacuum line from the #2 or #3 carb.
Put the petcock on PRI...how is the flow?
Put the petcock on RUN...does it flow? It shouldn't.
Suck on the vacuum line...does the fuel line flow? It should.
Is the flow the same or less than in the PRI position?

[Wrenchhead]

Thanks thats a good systematic way to look at it. I will try that tonight

[Wrenchhead]

This is my petcock set-up, no PRI or ON

[BassCliff]

Hi Mr. Wrenchhead,

Oh no! The dreaded 1980 petcock!

Actually, with that petcock you use a flat screwdriver to change between "Prime" and "On". There is no "Reserve" or "Off" on that petcock. With stock Suzuki vacuum petcocks, there is never an "Off" position. If the motor is off, there is no vacuum, the petcock does not let fuel flow. In the Prime position, fuel flows via gravity.

If it tests bad, you can either buy a new on and not worry about it for 20 years, or replace it with an aftermarket Pingle or other.


Thank you for your indulgence,

BassCliff

[cbrophy22]

Sorry to hijack

What year and model gas tank is on that cafe?
Thanks
CB

[omaharj]

http://www.thegsresources.com/_forum/showthread.php?t=137919&page=3

Is this the same bike?

[Wrenchhead]

I went home and checked this plug wires and firing order, they were correct, however I did tear down my petcock and found some slight cracks not all the way through the diaphram. I order a new one

[Wrenchhead]

And yes it is the same bike unfortunately.