Speedo and tach wigging out at high speeds

My tach and speedo do fine until i'm going around 70. Then they both begin to give outrageous readings of constant fluctuations. It's really annoying because I can't tell what RPM i'm at after around 6-7. They just start wigging out. Anyone know what could be wrong? Thanks a bunch

"Wigging out" :laugh:

We used to use that expression for a meth addict that lived on our street! :laugh:

Anyways... They're wiggin cause thery're old. The magnets/mechanicals inside have worn past the point of being able to properly report to the needle.

These guys are yourbest option for help/repair: Z RESTO

Cheers!

Have you cleaned&lubed or replaced the speedo & tach cables lately? Ed

Omaha Rider wrote:

My tach and speedo do fine until i'm going around 70. Then they both begin to give outrageous readings of constant fluctuations. It's really annoying because I can't tell what RPM i'm at after around 6-7. They just start wigging out. Anyone know what could be wrong? Thanks a bunch

If mechanical meters, might help to clean and lube cables.

Good Fortune!

kzrider.com/index.php?option=com_kunena&...ew&catid=8&id=382004

Good Fortune!

650ed wrote:

Have you cleaned&lubed or replaced the speedo & tach cables lately? Ed

yes I have

if you have ever just added washers to tighten up the mounts remove them and replace the foam cushion between the mount and the gauges

fixer5000 wrote:

if you have ever just added washers to tighten up the mounts remove them and replace the foam cushion between the mount and the gauges

Thanks to another member who suggested using a computer mouse pad.

Good Fortune!

Patton wrote:

fixer5000 wrote:

if you have ever just added washers to tighten up the mounts remove them and replace the foam cushion between the mount and the gauges

Thanks to another member who suggested using a computer mouse pad.

Good Fortune!

That sounds like a great idea! I'll have to try that the next time I'm wrenching on mine. My guages flake out at speed too.

Probably a harmonic vibration causing the needles to read really wrong. Change the old,hardened,rubber dampners first before send the instruments off for repair.

I fixed the loose mounts in my Z1 guages using some rubber washers from a plumbing repair kit. One of those universal type kits from Lowes.

When I bought the beast 8 years ago the speedo would go crazy when it hit 40kph. I unscrewed the cable, undid the brackets etc and took it off. I shook it and it rattled. OK I thought, there's something rolling around in here. I cut the chrome ring which holds both halves of the speedo together. I opened her up and there was a little 12V bulb holder - did I mention the speedo lights did not work ? - rolling around and messing with the inner workings. I put the holder where it should be. I put the 2 speedo halves together and put the chrome ring back using PC7 Epoxy. I got new bulbs and everything is good since.