finally got the lack-of-spark situation straight on my GS - was a corroded connector.  Now I have a different problem, here are the symptoms:

-Rhythmic backfiring ever 4 seconds at 2k RPM (cleared up a bit as I synced the carbs as much as possible)
-Carbs won't sync - using homemade sync tool -- left cylinder vacuum climbs fast at idle, both about equal/stable around 2k, right cyl. climbs fast above 2k RPM.

-- Also, blowing some serious smoke, could is just be from running the bike only on the left cylinder for a while when I was trying to figure out the spark problem on right cylinder?  Or is it Fatal?  Bike's only got 3k miles on it - I'm guessing maybe fuel washdown destroyed the rings on the right piston?  It barely smoked at all when it was runing on Left cyl only.  Please leave input.... 

What color is the smoke?

looked blueish white like burnt oil smoke.  I went out and fired the GS up again - and it really isn't smoking anymore now - was it just that the cylinder was REALLY flooded but the left one wasn't?  Seems OK now - gonna give it another shot tomorrow to make sure everything is OK for sure

Quote from: krypto35 on January 25, 2007, 02:52:48 PM

-Carbs won't sync - using homemade sync tool -- left cylinder vacuum climbs fast at idle, both about equal/stable around 2k, right cyl. climbs fast above 2k RPM.

When you can't use the Vaccuum tool just use your eyeball. What I did it look straight down the carbs while they were at WOT and adjusted the flaps until they were parallel. Then I used the tool. I had to do this because before it would just suck my liquid into the engine they were so out of balance