Motorcycle Repair: TL1000S Electrical(?) Problems, 1997 suzuki tl1000s, k n air filter

Question
Hi Mark,
 Here goes. I have a 1997 Suzuki TL1000S with 13,000 miles. It sat over the winter in PA in a garage( only winterization done was Stabil in gas tank). I went to start it this spring and drained the battery trying to get it to turn over. I recharged the battery and tried again, nothing. I figured I had flooded the cylinders in the process so I pulled the spark plugs. They were wet with fuel. I left them out for 2 days to let the fuel evaporate out of the cylinders. I bought new spark plugs, changed the oil and filter and tried to start it agian. It turned over right away. I let it run for a while and it was backfiring alot, sputtering and spewing blue/white smoke out the exhaust pipes. It then started to run somewhat normally and I rode it for a few days. I went to start it after 2 days and it turned over, stalled and wouldn't start  agian. I pulled the plugs again and they were wet. I cannot get it to turn over. Both front and rear plugs are sparking, but they seem weak ( the spark is jumping the gap at the bottom of the electrode instead of at the end where (I think?) it should be. I'm not very mechanically educated, but I thought it might be bad ingnition coils, or a valve that's not seating properly. Any thoughts?  Repair history is as follows: new clutch installed by dealer. Valve adjustments 6 months ago by dealer,who broke a "spider cam" (?) in the process and replaced it. Fuel pump replaced after recall. Regular oil changes, 2500-3000miles.
Mods: K&N air filter, Yosh. RS3 Full SS exhaust, PCII   
Thanks in advance for any suggestions you can give.
  -Sol Lothe
   State College, PA

Answer
Hi Sol,

The TL1000 is an awesome MC. Love that thang!

From the description given, I suspect the fuel in the carburetors have varnished during storage. This is very common, probably number one complaint with service departments every spring.

Sta-Bil is recommended, but we must follow label directions to the letter. Too much added to the fuel causes problems, including wet fouling spark plugs.

I suggest replacing the fuel and cleaning the carbs. If you send me an email address as requested, I'll return several files on carb cleaning, tuning, and synchronizing (and more). Sen to my email: mshively1@woh.rr.com

Respectfully,
Mark Shively
Dayton, Ohio