2004 FE450 camshaft advice

I bought recently this FE450 2004 .
Very hard to start when hot ,also in cold condition seems much compression.
i opened the camshaft cover for inspection.
I found the play of tappets for exhaust over 1 mm play ...( yes 1 mm, right ) , The intake tappets space were around the recomandation.
I used 1/6 turn .

I ask other members here to have a look on my pictures to give a feedback about the usage of my camshaft, and the spring for decomp .

Camshaft its quite sharp on the edges but no dents..

Decomp Spring seems quite soft but i dont know the real strenght....

I also found some dent in the cover head where the valves intake and exhaust hitted sometimes , i believe its factory mistake.



i also uploaded a movie about the cam of the autodecomp spring maybe someone can understand its at the end or not..



movie link here :

Thx Taffy, just seen now the movie "Fitting decomp spring part 1" where you removed the stopper nut on the sprocket . I-ll do that,thanks for the tip.

Here its a pic few days ago in Bbcovina area ( Romania )

Ill order from ur ebay shop the spring .

Meanwhile ill try to overheat the spring )