Yes, the plastic grips and pretty much everything else mounted to the handlebars is cheap garbage. Mine has so far held together, but - there's an easy enough fix, just get a set of Kuryakyn Iso-grips to replace the Triumph-labeled grips, and a set of good mirrors to boot to replace the stock round useless crap. As for stripping out four handles... I have to wonder if there isn't something going on. Could the throttle cables be so poorly adjusted they hit maximum throttle while you're still twisting the grip and then rip the cable out with the last twist? Mine has held up for two seasons so far, and they're the infamous heated ones (getting replaced as part of the winter projects though.)