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Jumpy speedometer

B

Bill Blue

Platinum Level Sponsor
The speedometer in the '69 was very jumpy, really unreadable. Oiled it up and greased the cable. About a 50% improvement. Decided to forget the speedo and drive by a tach. That worked out pretty good. But on the 120 mile trip yesterday, the speedo behaved itself. Dead solid reading, 10 mph high at 60 mph, about 15 high at 70. So, if your speedo has been lubed but has not settled down, try being a bit patient. Might pay off.
Bill
 
Tim R

Tim R

Silver Level Sponsor
Bill, I don't know if your cable is the original or a replacement but most modern/replacement speedo cables come with a warning NOT to lubricate them in any way. I believe that they have some kind of teflon lining that doesn't like being oiled. Normally if the speedo is jumpy it is down to routing and the cable being put through too tight a curve. If you want to get the speedo reading more accurately you can change the plastic gear wheels inside the head to get it spot on. There are various videos on Youtube showing people doing this.

Tim R
 
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