Both the stars are big bike enthusiasts and will embark on a 382-mile trip along the Pacific Coast Highway, from Los Angeles to San Francisco. David will ride his custom-built 93 Knucklehead, while Ramsay will be on his 20,000 pounds Harley Davidson motorcycle, reported Daily Mirror online.
"It's a 'boys only' trip for a few days. They're planning a couple of pit stops on the way to make a mini-break out of it. They want to squeeze it in within the next six weeks while it's still summer and Gordon is in Los Angeles," a source said.
David currently resides in Los Angeles with his wife Victoria and their four children, while his close friend Ramsay and his spouse Tana are mainly based in London with their four kids.