I have a 2001 Honda CB250 and would like to examine/replace the spark plugs on it. It didn't come with any tools and the manual says I need an 18mm Spark Plug Wrench. After looking around some tool stores today I've failed to find one (they're all 16mm or 21mm). I can get one from the states for about $20 AUD. OR, one of the guys at autobarn told me just to use a long 18mm standard socket on a torque wrench, but put a bit of rubber hosing inside the socket to protect the plug. What do you guys think? Buy the proper tool or is a normal long socket fine?