I take off the caps and lightly squeeze them with pliers so they are just out of round then screw them on. Never lost one yet. Also I would think locktite would be a bad idea. It's not conductive and could isolate the cap from the plug.
Final Update
Here are some pics of the final installation. I rode it today for the first time. It looks and rides great. Way more stabil. Thanks for all the help everyone :biggrin:
The pilot and screw only effect idle to 1/8 throttle. Out on the screw is more air in is less air,(at idle-1/8) Try 1-1 1/2 turns out from lightly seated all the way in.