The camchain noise is normal. These bikes had camchains that stretched like underwear elastic and the tensioner was a dodgy deisgn that worked on equal parts spring tension and voodoo black magic.
If not tensioned every 1000-2000 miles, it would get loose and start wearing into the adjuster arm, which as mentioned, is no longer available from Honda. Once the adjuster arm is worn into, it locks up, precluding any further adjustment of the camchain. Supposedly, a slack chain doesn't damage the engine, it just is noisy, however, one member here had a loose chain eat into the cylinder block and damage it.
My camchain makes noise and I am going to tear into the engine and replace it and repair the arm. At that time, I am going to replace the chain with a DID solid-sideplate heavy-duty chain, which after the initial break-in period, should stretch less than the factory chain, requiring less maintenance and reducing the risk of damaging the tensioner arm.
The tensioner arm is also used in the 350F, so if you find one of those, it'll work.
As far as the clutch noise, that's the fairly common "Clutch Rattle" which is the result of the clutch being vibrated by uneven firing impulses at idle. The culprit is unsynced carburetors. With some cylinders pulling more air/fuel than others, the firing impulses are more powerful in some cylinders, resulting in the cylinders "fighting" each other. The crankshaft sets a vibration through the primary chain, which manifests itself in the clutch basket. Sync the carbs and it goes right away.
