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The bike is running a treat after all the help I’ve received from you guys so thanks for that. 
After the summer ends the plan is to do the Liska cam wheel upgrade and also to fit a new camchain as mine is a little noisy. After about 15 seconds from a cold start the noise disappears so i can live with it for now. Z Power here in the uk can supply a new chain and a special camchain breaker/riveter so I don’t need to strip the bottom end of the motor. What I would like to know is will I need to remove the cylinder head (I’m guessing yes) or can I do the job by just removing the cam box cover. Also while I’m in there is there anything else I can do that may crop up sometime in the future? 
 

I replaced the camshaft drive chain without splitting the motor using the riveting tool. See  Kawboy's restoration post #8794
Now I think I had the head off at the time. Have a read and I think it's self explanatory.

You're replacing the cam tensioner sprocket with the Liska sprocket so you 're going to have to pull the head to do that. The tensioning arm with the sprocket and wheel are held in place by the cylinder head. And if you are going that far, I would replace the tensioning wheel as well. (the rubber wheel). Then you are all set as far as the camshaft drive system for another 100,000 miles