Hello all! I'm new to the forum and also new to motorcycles; that doesn't mean I'm not good with wrench. I recently bought a 1982 Suzuki GS650L that needed carbs tuned and most likely a new battery. The bike started up and ran for a few moments until it died out. I've gone through all the steps. I charged the battery to full and had some luck with the engine coughing, but not starting. I checked my fuel flow and it was flowing fine. When checking the plugs they had a black layer of what I assumed to be oil on them. New plugs have been put in and it still won't start for me. I've checked the spark on the plugs and it was pretty weak, even on the new plugs. But now when I try cranking the engine, I hear something like air is escaping from somewhere. I want to do my own work on the bike, but after frustration I'm getting tempted to pop it over to a shop, which I would like to avoid if possible. Any help is greatly appreciated! Thank you.