Samsung Crescent Suzuki has confirmed that John Hopkins will miss this weekend's Cadwell Park BSB round.
The American recently underwent surgery after breaking several fingers in a practice crash during his second MotoGP appearance of the season, at Brno in the Czech Republic (pictured).
"Unfortunately Hopper's hand is not healed enough to race this weekend, and while this is disappointing to us and the fans it is the right decision when we consider the upcoming Showdown phase of the championship," said team manager Jack Valentine.
"Hopper's been in daily contact as he's undergone intensive laser treatment and hyperbaric chamber sessions. He's explained the external pins are expected to be removed on Wednesday, but of course the weekend is too soon after that for his hand to be sufficiently healed."
Second in the BSB standings, Hopkins is guaranteed a place in the top six Title Showdown, but will be denied the chance to claim extra podium credits - while fans will miss out on seeing the ex-Motocross rider launch into the air over the Mountain.
Cadwell Park is the final event before the three-round Title Showdown begins at Donington Park on September 11.
"We will, we suspect, lose a few podium points to our rivals in the Showdown, but to race a superbike at a track such as this when you don't have 100% strength in your throttle and brake hand is simply too dangerous both to the rider and his competitors and would only stand to slow Hopper's recovery from the injury," said Valentine.
Hopper will not be replaced and Jon Kirkham will thus be the team's only rider at Cadwell Park.
"The team will nonetheless be at very near full-strength as we look forward to giving Jon Kirkham additional resources for the weekend," continued Valentine. "He'll have two crew chiefs working for him as well as his regular crew of mechanics and we hope this will fast track his set-up, allowing him to get back to where he belongs, at the front of the field."
Kirkham is ninth in the championship, 23 points behind sixth-placed Ryuichi Kiyonari.
This weekend's round will feature three races, following the cancellation of an Oulton Park race, due to poor weather, earlier in the year.