I think you may have some challenges.
Looking at the parts reference, the RJ and RK (MC19s) have different speedo part numbers and different wiring looms.
While the MC22 have a common wiring loom (but different to MC19), there are three more speedo part numbers: RRL and RRN common while RRR and RRR-2 are difference.
I hope this makes sense.
Well, I made a mistake. The clocks I have are from an MC17, not an MC19 like you need. Sorry for my error.
Have you checked a Japanese sight called Crooober? I've seen CBR250 parts for sale there and they will export to other countries.
Good luck with your bike!
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