Speedo cable

Please can anybody tell me if there is a cable that is 820mm long that will fit 900ss clocks or do i just get venhills to make me one ,i have moved my clocks because i am building a Baines imola .

I can’t think of a bike that might need longer speedo cable, except maybe the Elefant, does that use the same drive and clocks?

Thanks for the reply Kevin i got venhills to make me one.