1978 gs1000e grey smoke coming ONLY from right exhaust

[lrgguy]

Wow! What is it with the 78,79 1000 petcock that makes it so darn expensive? I looked and couldn't fine a complete assembly alternative to OEM or the kits.

The firat prts place I called must have messed up .... at suzuki Iin mississauga there 199.48 plus tax and there on back order , so he canttell me howlong till you get it !!

[steve murdoch]

Chuck sorted out that a '77/'78 GS750 petcpck will work with a couple longer lines.

http://www.thegsresources.com/_forum/showthread.php?t=219092&highlight=petcockp

[lrgguy]

Chuck sorted out that a '77/'78 GS750 petcpck will work with a couple longer lines.
http://www.thegsresources.com/_forum...light=petcockp

Thanks ill go through the link and read ..

[lrgguy]

Check your petcock. Fuel can leak down the vacuum line into #3 if the diaphragm is leaking. It could be enough to cause smoke. It would smoke more in the stop and go traffic because there's more vacuum and less airflow through the engine. The vacuum line should be dry inside, if it's got any fuel in it that's your problem.

Any other suggestions on what might be causing the smoke to come out of the right tail pipe ? Like im talkimg a big blast of smoke every time I stop the bike at a red light .
I tried what you suggested and I thought for sure when you said gas in the vacume line would cause this , then to see gas was infact in the vacume line , I was certain you nailed the issue ...
But like you suggested ... I disconnected and plugged up the vacume line and ran the bike on prime for 30 min and unfortunately it resulted in the same outsome ...
White / grey cloud of smoke from rigjt pipe at any stop

[JTGS850GL]

Have you checked the plugs to see which is the offending cylinder?

[chuck hahn]

Riding and setting in traffic with it in the PRIme position will not hurt anything. All your doing is making the PRIme an ON position as if the carbs were pulling a vacuum like normally would happen. As was stated dont leave it in PRIme..always move it back to the ON psoition if the engine isnt running.

[chuck hahn]

Smell the pipe...smell like gas or oil????

[lrgguy]

Smell the pipe...smell like gas or oil????

Pipe smells like gas .... and yes I removed plugs , it appears as though its number 3 is soaked with gas , and all four cylinders are sparking ...
I thought for sure yesterdayproblem was solved when I was told to check the vacume line going to #3 carb and there was infact gas in that line .
But after plugging up the vacume line and diconnecting from tank , this problem still occoured ...
Im no mechanic ! But now im thinking something has to be incorrect with the float bowl heights or a jet for that number 3 carb ..
Correct me if im wrong please ... lol looking to try any suggestions ??
Thx

[tkent02]

Smells like gas, that's good. Carbs are easier than engines to fix. Without reading back through the whole thread, have you been in the carbs before? A float stuck wide open could do this, sometimes the float can get stuck on the gasket, or stuck in goo from old gasoline on the bottom of the bowl. Did you try whacking it on the side of the float bowl? Sometimes it works.
Try testing the fuel level in the bowls as the engine runs, that will tell you something.

[lrgguy]

Smells like gas, that's good. Carbs are easier than engines to fix. Without reading back through the whole thread, have you been in the carbs before? A float stuck wide open could do this, sometimes the float can get stuck on the gasket, or stuck in goo from old gasoline on the bottom of the bowl. Did you try whacking it on the side of the float bowl? Sometimes it works.
Try testing the fuel level in the bowls as the engine runs, that will tell you something.

Yeah when I originally fired this baby up I had an issue with gas over flowing . And you told me to tap on the bowl , and when I did that it stopped the fuel from coming out the overflow hose ..
Last weekend I pulled the carbs and just removed the bowls on all four carbs , toIinspect and see if something looked wrong or was out of place , I was wanting to see if a float bowl was sticking .. removed all float bowls and cleaned float bowl needles in all four carbs . Jets didnt look to bad ! Was impressed with how clean it was in there !!
Didnt do a dip .. but blasted carb cleaner and put a needle through all holes and jets etc .

[lrgguy]

Smells like gas, that's good. Carbs are easier than engines to fix. Without reading back through the whole thread, have you been in the carbs before? A float stuck wide open could do this, sometimes the float can get stuck on the gasket, or stuck in goo from old gasoline on the bottom of the bowl. Did you try whacking it on the side of the float bowl? Sometimes it works.
Try testing the fuel level in the bowls as the engine runs, that will tell you something.

As for testing float bowl levels while running .. last night I did look for a bolt or something I could drill outto do this . I guess that is the only way ofchecking level of gas on the bowl . By removing drain plug and having a matching bolt thats drilled with a piece of tubing attached ?

[lrgguy]

Smell the pipe...smell like gas or oil????

Oh and once I have noticed this happen ... I have a tiny pin hole right at the weld where #3 pipe adjoins to #4 pipe .and after a 1 hr ride I parked the bike in thedriveway and was watching the last few puffs of smoke comeout the rightpipe as the bike was off and noticed a small puddle of gas begin to form right under that #3 pipe .. when i looked more closely and wiped with finger and smealt , it was gas ! I dunno ...

[chuck hahn]

You got a problem in number 3 carb I would say for sure. Also, I have had plugs that sparked nice and pretty outside the engine but wouldnt installed. I would throw a different ( or swap a plug ) just for chits and grins to see what happens.

[lrgguy]

You got a problem in number 3 carb I would say for sure. Also, I have had plugs that sparked nice and pretty outside the engine but wouldnt installed. I would throw a different ( or swap a plug ) just for chits and grins to see what happens.

Ill give that a try Chuck .. swapping out plug !!

Thx for your help
And ill be pulling the carbs again ..

[chuck hahn]

Just had another thought. Do you have the old plug caps with the ceramic resistors in them?? To check, pull off 1 or 4 and look inside and youll see the plug socket is slotted. Unscrew it and dump it into your hand and see if theres one in there. If so, remove all mof them and replace with a 1/8 diameter piece of copper or brass rod cut to the right lengths.

Note that 2 and 3 have a spring that goes into the cap first, then the resistor, and then the slotted socket thing. Those resistors fail and youll have a weak to no spark and thus very poor fuel ignition on the cylinders.