Z1000 crank end bearings surface wear

[Speedie]

Hello all!
I've noticed the surfaces of the two crank end bearings have what looks like slight corrosion. Is this bad enough to be of concern? The inner bearings are showing similar but not as much as the outer ones. There isn't play or wear on the actual bearings themselves. Please see photo. Is this the sort of thing Debens or Buzzard would sort out?
Thanks
Paul

[ADRIAN H]

Debben performance or Buzzard would do a good job.

[DeadZedDave]

ANY corrosion on Crankshaft bearings is bad news.
IF the brown stuff in the pictures is RUST you probably need a replacement crankshaft.
It would seem like a good idea to remove the circlip and carefully slide the bearing off and have a closer look.
If its rust then a replacement crank is likely to be cheaper than a set of crank bearings plus labour to fit.
New bearings wont fix a rusty crankshaft either !