Motorcycle Repair: 1971 cb 175 head gasket, valve cover gasket, head gasket

Question
I need to replace the head gasket on my 1971 cb 175 (oil leak).  Where are the alignment marks/How do I set the cam/flywheel to make sure alignment is correct when I reassemble?  Also, what tool do I need to separate the cam chain and is the master link obvious?  When replacing the valve cover gasket, I noticed that the oil was coming from the head gasket instead.  

email is cckhelp2@netscape.net  please do not post email address on forum.  Thanks.

Answer
Hi Jens,

Unless you can find a service manual for this motorcycle, I recommend having a local Honda tech perform this work for you.

My resources don't date back that far. I certainly cannot remember the specs and procedures.

Respectfully,
Mark Shively