cam chain

I bought a used 2005 DL650 with ~ 78000 miles. The previous owner's mechanic suggested to replace the cam chain/tensioner because he thought the front cylinder was noisy (Imperative to replace in ~1000 miles according to him). I asked another mechanic for a second opinion, and he was positive...

There's no real mystery here, the engine was low on oil and the topmost parts were the first to go. Post mortem shows that the rear cylinder intake camshaft journal seized up. The bearing surface of the aluminum head is galled and unusable, so I am shopping for a used cylinder head. But I would...