LimaXray:
I noticed you said my spark plugs might be too cold of a heat range.
I went to the following website and my spark plug looks like the oil fouled spark plug in the picture.
http://www.ngksparkplugs.com/techinfo/spark_plugs/overviewp3.asp?nav=31000&country=US
The problem is, my right spark plug looks fine and is self cleaning. The brand I have been using is NGK DPR8EA.

The good news is, I have just run a test on my spark plug cables and they both are strong and equal so this rules out coils/electrical, etc. I then attached the cables into my spark plugs and ran the same test, one of them had a low reading. So maybe it is a spark plug causing the whole problem? Im going to continue to test tomorrow and find a good spark plug  amongst my collection (I have about 12 spark plugs from a previous time I had a carb problem (which was resolved by using non bleeder pilot jets in the end).  You mentioned champion 809 spark plugs. What heat range are they?

Everyone else who wants to help:
I also ended up opening up my engine cover and checking the clearance of my valves. I am going to make a video tomorrow because there's something suspicious on the right exhaust valve (a rough groove in the centre of the cam and I cant fit a 0.05 mm gauge under it at all). It's really hard to describe in words so I will just show it. I know the clearance can be between 0.03 - 0.08 but I dont have an 0.03 feeler gauge...I managed to score an 0.04 feeler guage off a friend tonight so I will try that out tomorrow in the video.

A lot of people with aftermarket jetting have problems with the stock NGKs and fouling, and swear by the Champions to fix their problems.  I have not messed with anything on my bike, so I don't know first hand, but I do know first hand a colder plug with a richer idle will foul like mad.  Different brands use different heat range scales, so there is no way to really compare the 2.  Champion does recommend the 809 for the GS; my guess is it's just a slightly hotter plug. 

You may also want to try a hotter NGK plug, like the DPR7EA.  The stock 8 is a really really cold plug for such a conservative engine, I'm not surprised it fouls. 

1st, the disclaimer.  I do not own a GS.  Just a newbie to this forum, but I'm a licenced auto mechanic.  Definately, before you do anything else, swap the ignition coils left to right, ride the bike, and see if the other plug goes "oil fouled".   Rule out the ignition first.  You could even check the the voltage at the coil with the key on and a DMM.

You'll want to avoid using water inside a carbs.   You can submerge them in gasoline, using dishwashing or long nitrile gloves, clean all the valving, jets and needles.  Ultra thin metal picks are good for cleaning the surface of ports, and a can of carb cleaner with it's straw do a great job cleaning passages.

Sounds like you know what your doing.  Eliminate probable problems where you can (eg: coil swap).  Use a temperature gauge to check your exhaust pipe temps to see if one is running lean (hot) or misfiring (cold).

Cheers,

Thankyou for your advice.
Well my bike is up and running again since last night. Im not exactly sure what fixed it.

This is what I did:
I did find my choke cable was very stiff so I took it off and lubed it.
I checked my valve clearances and replaced 1 shim that was tight on the right exhaust.
I cleaned the carbs again using the correct cleaning liquids. I ensured everything was seated properly while assesmbling it again.
I put an inline fuel filter on

Kellie