So, I was out the other day and was kind of jammed into a spot. I revved it up a little and let out the clutch. The tires didn't spin, and the engine didn't immediately die. I checked it later (after it was cooled off...) and it takes about 2 seconds if I rev it up and let the clutch out in high gear. It does kill it, but I'm wondering if it's close to needing replacement. I adjusted the friction point so it's very low, but it still runs a couple of seconds before it dies. Is my clutch about gone, or is that normal, or what?