Tach moves incredibly slow

[exbellicus]

My 80 GS450 is almost road ready, a few fixer-uppers and it will be all over the Texas roads. One of my issues remaining is the tach. In addition to the light being out (thinking just a bulb), the tach creeps up maybe 1k every 5 seconds til it gets to (I'm assuming) the correct RPM.

Any thoughts?

 

[Dave8338]

Electric or manual tach?

 

[exbellicus]

Electric or manual tach?

Not sure, this is my first bike. How can I tell?

 

[rustybronco]

do it be gotts a cable running from the engine to the back side of it?

 

[Guest]

do it be gotts a cable running from the engine to the back side of it?

.. Looks like a speedo cable

 

[exbellicus]

do it be gotts a cable running from the engine to the back side of it?

Sure does. Bike is at a buddy's shop where we've been working on everything. But I remember following the cable down to the engine

 

[gggGary]

Put a few miles on it and see what happens.

 

[bonanzadave]

do it be gotts a cable running from the engine to the back side of it?

:clap:

 

[rustybronco]

Put a few miles on it and see what happens.

if not... http://www.thegsresources.com/garage/gs_inside_gauges.htm and put a "SMALL" spot of oil on the needle pivot bearing.

 

[BassCliff]

Hi,

Is it the stock tach? If so, there should be a cable you can lubricate. It runs from the bottom of the tach into the head where it's driven by a gear next to the cam. See: http://www.bwringer.com/gs/tachcableseals.html . I've had good luck turning the gauges upside down and squirting a little WD40 in the input holes. You can also use silicone lubricants.

Thank you for your induglence,

BassCliff

 

[donimo]

if not... http://www.thegsresources.com/garage/gs_inside_gauges.htm and put a "SMALL" spot of oil on the needle pivot bearing.

this worked for mine

 

[chuck hahn]

Ditto what Cliff said about lube in the bottom of the guage where the cable goes..I had one that was sticky and just gave it a few quick spurts of PB blaster and put cable back in and rode it..took a few days bit it worked its way in and freed everything up just fine. Doesnt hurt to pull the cabl;e out of the casing and clean that too. To clean the casing i use a long piece of mig welding wire like a gun cleaning kit and pull a patch through till it comes out clean and then relube that also.

 

[GS1000S]

I had a slow speedo needle. It was caused by a glop of factory grease in the gauge that relocated itself after 30 yrs. and slowed things down. When I took my speedo apart I did it a little differently. I used a flat blade screwdriver and slowly pryed the metal away from the plastic, cleaned and lubed the internals in the speedo, and reinstalled the bezel ring with a little silicone sealer and recrimped the ring to the plastic with a Vise Grip pliers. It's been working fine for a couple of years.


1000S