Installed on 2019 Z650. The mirror is fine, the fittings are decent enough. But I'm telling you, replace the cheap hardware. Home Depot socket head cap screws: one pair M5-0.8x15mm (for clamp), one pair M5-0.8x16mm (for rotator) and two pairs M5-0.8x10mm (for mirror base). It came to $3 and change. The kit screws are junk, don't even install them or you'll twist them and have trouble pulling them back out. They take a 3mm hex, by the way. The Allen key included in the kit turns just as easily as the screw head. The larger screw that goes into the handlebars is fine, I didn't find it necessary to change it, but I didn't use the Allen key that came with it either. Much luck. Just remember you get what you pay for.
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