The 24-year-old Anglo-American will have an MRI scan in San Francisco on Monday, after which Doctor Arthur Ting will decide on the best method of treatment to get Hopkins back on the bike in the shortest time possible.
"Hopefully we'll also have John back for Jerez, but we'll know more when he's had the chance to consult with his doctor in San Francisco on Monday," said Bartholemy. "The injury is not serious, but it's one that could cause ongoing problems if it isn't treated properly now."
With his team-mate on his way home, West will fly from Australia directly to Japan, where he will take part in a wind tunnel test with Kawasaki's race engineers.
