The FIXI Crescent Suzuki rider has been hit by a hand injury and a hip problem sustained in a crash six months ago at Monza, and he has opted out of the 2013 season to get himself back to full fitness.
“I have really struggled with my hip since the crash at Monza and I know that it is a priority to get my health sorted before I can even think about racing again," he said.
"I didn't want to pledge myself to the FIXI Crescent Suzuki team for 2013 and then not be able to give 100 per cent because the injury is a constant worry, so although this is a difficult decision it is the correct one.
"I will be going back to America for a bunch of tests and then we'll decide what the best course of action is. If that is a hip replacement or something similar, then that is what I am prepared to do to make sure I can get my health and fitness back.
"At the moment the injury is influencing everything I do in my home, personal and racing life, so I need to get it sorted out properly.
"I still have the desire and passion to race against the world's best riders but every time I have pumped myself up to go for it this season, the hip has quickly and painfully reminded me that I need to be careful – and that's no way to go racing."