Topic: Lazy tach

[johnyvilla]

My tach has the benefit of a new cable but still jumps around a bit and does not register below 1100 rpm. What steps do I need to take remidy this problem?

[CB500_k2]

Had the same problem.  I had to take the instrument apart and apply a bit of lubrication to the moving parts.  You can use a Dremel cutoff disk to cut the chrome ring around and then open up the tach.  A spot of JB weld will hold the ring back together.

[johnyvilla]

Isn't there a was of doing it without cutting the tach ring?

[CB500_k2]

Some people carefully pry the ring open but I have found that the thin cutting disk on the Dremel does a nice surgical cut on the ring and the JB Weld makes a reliable closure.  you can put the cut on the lower part of the ring so no one can see it.  A large (3in diameter) hose clamp makes an excellent clamp for reassembly.  I have repaired several tachs and speedometers without failure.