Our Yamaha PW50 CNC'd Billet rear brake perch with all stainless-steel hardware is for Aftermarket handlebars only as the perch on stock bars are welded on and are not removeable. Many other companies use a cheap rear brake perch that will not tighten or will bend easy as it's made from thin material. Our CNC'd brake perch will allow the stock brake lever to mount to it and will work on Mika, Pax Racing, Moose and ODI handlebars that are 19mm or 3/4" diameter. MADE IN USA