If it's an imported rack, I would untie the RH boot from the tierod, put some 90/140 gear oil in a pressure can and squirt ~100mL in there. Then put a new cable tie back on.
Don't be surprised if it doesn't last long these days- I'd keep your receipt for warranty.
They ain't made as well as they used to be.... regardless of what some Mini shops say. And, they are non-repairable.
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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.
