They are race-proven on three land speed motorcycles here at the shop

and other custom handlebars

#3424-1 Nickle Plated Choke Lever 1936-1937 Harley-Davidson Knucklehead

including OEM Harley Davidson Horseshoe oil tanks

Fork Neck Cup Conversion Kit 7/8" to 1" Stem 1952-1981 Harley-Davidson Ironhead Sportster Length_1.218" They are race-proven on threeComplete Kit Includes: Neck Cups, Bearings, Races, Top & Bottom Dust Shields Allows installation of a 1" stem front end on 1952 1981 Harley Ironhead Sportsters Easily Install A Springer, 39mm Narrowglide, Harley Big Twin, or any other front end with a 1" stem No Grinding Or Modification Of Stock Frame Necessary With Our Kit Easily install a different front end on your 19521981 Harley Davidson Ironhead Sportster with this fork stem conversion kit. We