"1) remove chain tensioner
2) loose camshaft
3) Change the shims"
Yes it can be done this way but it's much easier and safer to do it with the compressor tool.
Here is an excellent "how to" on the valve adjustment:
http://www.webbikeworld.com/t2/valves/
Here is a scource for the adjustment tool:
http://www.geocities.com/mustanggarage/shim_tool.html
Somewhere on this forum are plans/drawings for making your own. (I just can't remember where)
