Went on fairly long trip last weekend and notice the bike was sputtering a little and had a little backfire once in a while. Anyway, I pulled the plugs and found that the front left was much darker then the rest as you can see in the photo below.
Some history, I replaced the TCI with the new electronic one from the group buy, I run a shot of seafoam with every gallon of gas, I only use Premium fuel. After replacing these plugs today, I installed Skydocs Shim Mod on the sliders and since the Torx screw was not present I have to assume the previous owner was already into these carbs. Diaphragms looked new with no holes at all.
I do have a set of new NGK spark plug wires I bought from ebay but i have yet to install them. I know I will need to have the carbs synced soon, but I am having trouble finding a dealer that will work on this vintage in my area.
http://i906.photobucket.com/albums/ac264/bobandlou3/IMG_0368.jpg