Had an oil leak that seemed to be coming from the crank cover on the right (brake) side. Ordered the gasket from dealer ($7), drained oil, replaced filter, removed crank cover, scraped old gasket, applied gasket sealant, placed gasket, applied more sealant and then replaced cover. I then filled with 4qt. of oil and waited ~1hr. When I tried to start the bike, the engine made a strange clicking noise that I assumed was because of the fact that the bike had sat for a few days before the oil change and that when the oil moved around the engine, this would stop. It ran (weak) for ~5sec. and then quit. After that, the engine wouldn't start. It sounds similar to when you try to turn the bike over with the kickstand down (no combustion).
Since then, I have removed about ~0.4qt of oil to bring the level down to the sight glass. Could the excess oil have fouled the spark plugs. The only other thing I can think of is that when I tightened the cover I had to wipe a little bit of the gasket sealant that had squeezed out. Is it possible that some of the excess sealant could have fouled the ignition pickup sensor inside the cover? I'm not sure how robust the mechanism is inside the crank cover.
In addition, the bike has a new batter with a fresh charge.
Any advice is greatly appreciated.