Bouncing Tach Needle

To help diagnosis, could disconnect tach cable at engine, and use a drill to spin the cable, while observing whether the moving needle is steady or jittery.

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Click here > www.zresto.com/

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Here's the diy option from an earlier thread ---

duncan wrote:
i've taken the tach apart but not the speedo. it's real easy if you use a dremel to cut the chrome ring, and then some jweld and hose clamp to cement it back together.

apeman wrote:
The old article suggests removing the band around the gauges by levering it up from the underside. I have found that results in too much damage to the band to make it look good after it is put back on, and crimped down. Therefore, I instead took a dremel with a cut-off wheel to the band, and sliced through it, being carefull not to damage the gauge cover. Then I slipped off the band, and did my gauge clean-up. To reinstall, I assembled the cover onto the gauge, slipped the band on, and held it tightly in place with a rubber band. Then I placed a drop of JBweld epoxy onto the gap in the band, and let it dry. (Make sure you mount the gap in the band at an location that will not be readily visible when the gauge is remounted onto the bike.) That has been working well for over a year.

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