Gpdesign, while it is true these parts are plastic and DO give, modern flex agents for paint were designed for use with thinner parts. You know, bumper covers on automobiles and the like. Those darn things will take a 15 mph hit from another vehicle and a little buff job will make them brand new, as I'm sure we've all seen. I think these covers would be fine unless you're really resting the weight of the bike on that cover while you kickstart. But it is great insurance against spiderwebs if something were to nick it.