Hey you're in luck! I live in San Jose, will be home this weekend, and have tools! I changed mine recently with what I have, so it must be do-able. Can't remember exactly how though. On OHC motors I almost always duct tape the socket to the extension, and the socket has a grabber gasket in it. I bet that's what I did. I also have vinyl tubing that can be used to get the plug out if the socket doesn't grab it.
Shoot me a PM and we'll get you hooked up.
If the socket doesn't have a rubber inside, simply putting a small piece of tape (duct or electrical) from the outside in, (test the tightness on one of the new plugs), you want it snug. Slip it over the old plug and it'll hang on to to it as you remove it.
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Parts from post #17 may help:
http://www.600riders.com/forum/fz6-technical/41921-ngk-iridium-spark-plugs-2.html :
"I found the problems most guys having removing the plug caps is rectified by gently prying up on the rubber cap that seals the plastic spark plug lead to the valve cover. I used a thin long screwdriver, wrapped in duct tape to prevent any scratching. Once the seal was broke, the caps came off much easier.. An air compressor was used to blow out any crap in each cavern..
When later re-assembling, I put just a little bit of di-lectric grease on the inside of the valve cover so the rubber doesn't stick, is more water proof and assembles much easier.
I used the tool kit socket but also used a combo box end 14mm wrench that rachets (Craftsman). Much easier, especially when reaching in to #2and #3 plugs. One click at a time due to the tightness..
For the new plug installation, I used a short piece of hose (about 5") that fit snuggly on the new plugs and feed that down into the hole and threaded it by hand.
Yamaha's manual calls for 13' lbs of torque, the spark plug box 1/2 turn past snug, NGK's website for a 10 mm thread 7.2' to 8.7 ' lbs of torque.
I was able to use the toolkit socket, with a short 6 point 14mm socket and an inch pound torqe wrench. I was able to reach all the plugs (with the radiator dropped per the manual) and torque to 7.2' (felt very tight)."
