How to shorten a Tach drive cable?

"Morgans" wrote in message
...

It has been pointed out that there are specialty shops that call
themselves a speedo shop, and I was surprised that anyone could make a
business on such a small subgroup of auto repairing. I stand corrected,
but I have never heard of such a thing where I have lived.

Speedo repair is/was a huge business. All taxicabs (at least they used to)
had to have their meters tied in with the speedo/odo and calibrated at
regular intervals. Many commercial vehicles have "Speed-o-graphs" or
"Tach-o-graphs" which record speed or rpm for monitoring by employers or
owners. Then there is the occasional aircraft repair job. We had several
such shops in Seattle. One of their services (I remember well) was to
provide error reports for drivers who claimed in court that, "Honest
officer - my speedometer only showed 50! I couldn't have been doing 73. . ."

Rich S.