None of our grips will work on a Harley-Davidson XG-750 Street. Those bikes have 7/8" handlebars and the housing is larger than our 7/8" grips so they will not work on your bike. We offer a one year warranty on the rubber of all our non heated motorcycle grips & will replace for free. After one year just send us your grips & we will put on new rubber for $30 and that includes the shipping cost back to you. Proof of purchase is required for one year warranty.