...especially when you haven't heard it run for a long time!
I bought my wife a bike for our anniversary last year, which she was super excited about. It's a '75 cb400f that I last heard run probably the day that I got it home (end of July). I parked it in the corner, and the plan was that we'd tear the bike down and restore it together...bike was modded a bit, probably back in the late 70s or 80s, and missing a couple parts, so it's not safe to ride now...
Anyway, since the temps have finally gotten to above freezing here, I went out to the garage yesterday, replaced the burnt out 15A fuse, put some new gas in the tank, put a charged battery on, and to my surprise it fired up almost immediately, while kickstarting it no less! Before we started to tear it down, I wanted to make sure it still ran okay, and had good compression, and now after hearing it run, I almost don't want to tear it down!