Street motorcycles and most dirt bikes use 7/8-inch handlebars. The larger, 1-inch size is almost exclusively for Harley-Davidsons (and some other cruiser motorcycles). Even a 1 1/8-inch oversize bar will taper down to 7/8 of an inch at the grips. Even dirt bike handlebars designed specifically for tall riders have the same bar dimensions and will work just fine with your grips.