Wyken's MotoGP rider Cal Crutchlow is to have surgery on his right arm.
Crutchlow finished eighth in last Sunday's race in Jerez, Spain but has had problems with his arm all season.
Surgery on his left shoulder to repair tendons and ligaments may have caused him to over-compensate and Crutchlow told Motor Cycle News: "I don't know whether it is because I've been compensating a bit with my right arm to ease the stress and pressure on my left shoulder, which is still recovering, or if it is just because a MotoGP bike is a lot more physical to ride.
"I've never even had arm pump on a motocross bike and that's the one thing where you normally get it, but now it is a problem all of the time. I can deal with it and ride with it, but I don't feel like I've been riding at 100% because it is a problem that affects you.
"You can't feel your hand and you can't get the brake pressure you want. I had some pressure tests yesterday and in the deep muscles the pressure is really high. The doctors think something might be pressing on the nerve or there might be some old scar tissue from another injury."