[TR] SU HS6 choke cable on a TR4

[Randall]

I may be mistaken, but I believe the idea is that the currently supplied
choke cable, listed for all TR4 and TR4A, is long enough to fit all
applications.  There are several different numbers in the original parts
catalogues (401894/5, 401900/1, 401903/4; depending on which carb was
fitted), but they all supercede to 401900/1.

FWIW, Revington says to "consider" TKC2772, which is listed for a RHD TR7.
Unfortunately, they don't give any particulars, so I don't know how you are
supposed to "consider" it.

-- Randall