Back to Stock Recovery only

Hi all,

how can get back my stock boot recovery (or whatever)?

I Stocked my cooperve with odin and just flashed Rafael-Kernel.
Everything was fine.
Then I made only a Backup with CWM 5028 and 6053 and now in Bootloop.
What can I do to boot existing Stock-ROM again without loosing data.
I can´t understand that I couldnt make a Backup with CWM and now device is nearly dead.

Thanks and regards