. Attach the large U-shaped yoke to the handlebar stem, insert the clevis pin completely through the two holes in the yoke, making sure the retainer clip is properly closed. Des Abstainer Clip Attach urge U-shape yoke to handlebar tam, Properly close Clevis Pin retainer clip, 3. Extend the adapter by pulling on the main shaft, and attach the small around the seat post. "Te attach slam “U” hook around seat-puts, 4.