What lens was that with?
Nowing the track, i think those are heavily cropped? as the focal length on the exif is 280mm which is a tad short for Silverstone to get that close. That could explain the softness
A tad faster shutter for 3 and 4 would have given a more completely sharp all over bike finish, i.e the back's of the bikes are slightly blurr'd, i like the effect tbh, others wont.
trick conditions out there by the looks off all the threads i seen.