My Gen1 has done 32500 miles and I was getting a bit of cam chain noise so I thought I'd give mine a check over,
This is new territory to me so I dug out Mr. Haynes.
Started the procedure by removing the cap bolt but as I read on, realised I would need a new seal if I was to remove the unit (which I don't have) so......
Instead, with the tensioner unit in situe, I put a screwdriver down into the hole and turned the plunger screw clockwise.
There was a definite resistance at first, as if it was slightly seized, but it then turned freely and could clearly be felt to be loading the spring.
When I eased the turning pressure, the screw was then returned to it's original position by the force of the spring and you could hear the contact as the plunger hit the chain again.
The screw now turns, tensions the spring and returns smoothly without me doing anything more to it.
There is no more cam chain noise.
So it appears to my small brain that a major seizure has been averted and I don't REALLY need to remove the tensioner unit for greater investigation but could it really be that simple.....?