This approved handlebar, with a tapered and butted 4130 chromoly construction, fits popular 1-1/8 inch ID aftermarket risers and accepts stock Harley Davidson hand controls and throttle by wire technology. Including CNC mandrel-bent radiuses for laser straight ergonomics and all day riding comfort and CNC-machined slots under controls for wire routing. The clamping area is 1-1/8" outside diameter to fit aftermarket risers. The tubing tapers are down to 1" outside diameter. The right side bar end is notched to accept internal Harley Davidson throttle-by-wire module. Note: Check your local MCS dealer or the MCS sales department for exact type of approval and validity on bike model and years on the test report.