Two questions about using this product to winterize a motorcycle. 1. Is it necessary to use it if storing the machine for 6 months or less, in a relatively benign environment? My mechanic says no. 2. If you do use it, you must remove plugs, spray in, then turn over the engine. I read that electrical damage can be caused by turning over the engine with ungrounded plugs. Why not just screw the plugs back in loosely, then turn the engine over a few times with the kill switch set to "off." Anything wrong with doing it that way? Thanks for responses. Paul Harris Victoria, BC Kawasaki Voyager 1200, if it makes any difference