WTF is up with my cam chain tentioner?

[ratvespa]

I went to adjust the cam chain tensioner in my 185S, followed the instruction in the clymer manual, no luck, still noisy. I even pulled the 6mm bolt out the top and poked a tool down there to see if it could loosed it up, no luck. Can I pull the large nut on the tensioner with out anything falling down in there? what else could it be? I really dont want to have to tear into the engine, but I also have the fear of the cam chain slipping since it did it to me on another 185.

[SWIGIN]

maybe the adjuster is stuck or the chain is stretched past the range of adjustment

[84honda200s]

mine is doing it too except mine keeps skipping. so i bought a new chain, tensioner, and looking for new sprockets.

[Erics350x]

Steatched chain or piston slap.