How do I change spark plugs in my 1500 Vulcan?

I bot a 1998 1500 Vulcan last week and it seems to be missing some. I want to change the spark plugs but was wondering if there is a trick to it. I dont mean to soung stupid, but I tried pulling on the plug wires and it would not come off.How do I change spark plugs in my 1500 Vulcan?my answer is try to check it out first on auto repair shop..dude