I bought my first 2t KDX a few months ago, and it has been one of the most thrilling events in my life!
Needless to say, lately I've found that when I am in 3rd or 4th gear and I am accelerating into high rpm down a straightaway, my clutch lever will become stuck. By stuck, I mean, imagine a rock or some evil dead gremlin's body impeding the clutch release lever that the cable connects to. At that point I am shifting clutchless. Once I get into second or first and stick to low rpm; it eventually starts working again.
It only seems to happen to 3rd and 4th gears, but it doesn't always happen (maybe 50% of the time).
I just changed the gear oil in an attempt to see if it would help. I believe I was running BelRay 80W Gear Saver from the previous owner. I put in some Motul 10W40 2T gear oil, and went for a quick ride. No issues! Then while riding on a longer stretch it happened again.
I'm now at the point that I'm probably going to need to take the clutch cover off, and see what can be seen.
I've searched around the web for this symptom, and watched a youtube video or two on clutch disassembly. It doesn't seem too hard (I said the same thing about copper plumbing too though

Has anyone had similar issues?
Any tips for a noob taking their first clutch apart?
Thanks!