I'm putting my Force90 back together and the crank case was freezing up piston movement. So I took it off again and found that this expansion oil seal had busted. It's a nightmare for met to get parts so can anyone tell me if I could get away with putting the ring and the busted bit back in?<br /><br />The ring is captive in a groove so I can't see why it wouldn't work.<br /><br /> Picture of stuffed seal... 