Hi. New forum member and could not find the answer in previous posts. Hoping you can help. Bought my first Moto Guzzi (1400 California Touring, 2014) three weeks ago. Previous owner (not reachable) installed an aftermarket swept back, smaller diameter handlebar. I found a replacement NOS handlebar "out of box" with part label #887549. Using calipers, the diameter is 28 mm. The hole in the handlebar risers is 24 mm. This seems a mismatch. Wrong handlebar, wrong risers, or am I missing something? Easy fix? Thanks! (P.S. if I've committed any grievous errors in posting please correct me so I get it right the next time.)