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Tach 2008 in GS 1998

Started by boxin, July 15, 2009, 11:38:08 PM

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boxin

Hi. Is possible to adapt a tachometer 2008 into a GS 1998?
Thx.

ineedanap

#1
Yes.  It's nearly a straight swap.   Mounting wise they're identical.  There is only a little electrical work to be done to make it function.  There are 5 wires on the new tach, 2 on the old.

2 wires are for the lightbulb.  The whole light bulb harness is a straight swap.  You can literally pull the rubber bulb holder out of the old tach and pop it into the new one.  

There are only 3 more connections on the tach.  They attach with small ring terminals you can get at any electronics store, or you might get lucky and someone left the small wiring harness attached (like mine was)

Positive -  (if you have the F harness it's the orange wire.  It's marked O on the back of the tach) I ran that to the brown wire of the accessory lead behind the headlight but I would imagine you could splice it to one of the orange wires in the dash harness.  I never tried that, though.  

Ground - (on the F harness it's the black/white wire.  It's marked BW on the back of the tach.) There are lots black/white wires in the dash harness to splice that one to, or use the black/white wire on the accessory lead behind the headlight.  

Signal -  (on the F harness it's the black/red wire.  It's marked BR on the back of the tach.) It splices to black/yellow wire on right ignition coil.

It's alot easier than it sounds.  Great swap, much better than the POS mechanical one.
My 90 GS500E has spread itself across the nation.

seamax

Quote from: ineedanap on July 16, 2009, 05:03:48 AM
Yes.  It's nearly a straight swap.   Mounting wise they're identical.  There is only a little electrical work to be done to make it function.  There are 5 wires on the new tach, 2 on the old.

2 wires are for the lightbulb.  The whole light bulb harness is a straight swap.  You can literally pull the rubber bulb holder out of the old tach and pop it into the new one.  

There are only 3 more connections on the tach.  They attach with small ring terminals you can get at any electronics store, or you might get lucky and someone left the small wiring harness attached (like mine was)

Positive -  (if you have the F harness it's the orange wire.  It's marked O on the back of the tach) I ran that to the brown wire of the accessory lead behind the headlight but I would imagine you could splice it to one of the orange wires in the dash harness.  I never tried that, though.  

Ground - (on the F harness it's the black/white wire.  It's marked BW on the back of the tach.) There are lots black/white wires in the dash harness to splice that one to, or use the black/white wire on the accessory lead behind the headlight.  

Signal -  (on the F harness it's the black/red wire.  It's marked BR on the back of the tach.) It splices to black/yellow wire on right ignition coil.

It's alot easier than it sounds.  Great swap, much better than the POS mechanical one.

So this is for the tach only right? Any ideas on how to cover up the tach cable hole on the engine
?

tt_four

I tried to look up some pictures of the 2008 gauges, but didn't have much luck. Is there much of a difference? I assume they're still not digital or anything, right?

ineedanap

#4
Quote from: seamax on July 16, 2009, 06:26:37 AM

So this is for the tach only right? Any ideas on how to cover up the tach cable hole on the engine
?

Yes, that's for the tach only.  

The F model uses an aluminum plug to fill the hole where the tach cable drive goes.  You need 4 parts from the F model...the plug, the oring, the bolt, and the metal piece that holds it in.  All the parts are available over the parts counter or bike bandit.  Just pull your old speedo drive out and bolt the new plug in.    
My 90 GS500E has spread itself across the nation.

dgyver

Quote from: ineedanap on July 16, 2009, 07:37:56 AM
Quote from: seamax on July 16, 2009, 06:26:37 AM

So this is for the tach only right? Any ideas on how to cover up the tach cable hole on the engine
?

Yes, that's for the tach only.  

The F model uses an aluminum plug to fill the hole where the tach cable drive goes.  You need 4 parts from the F model...the plug, the oring, the bolt, and the metal piece that holds it in.  All the parts are available over the parts counter or bike bandit.  Just pull your old speedo drive out and bolt the new plug in.    

I believe this may only be true on the 04 models, they still had the hole. I think they removed the hole in 05 and no plug required.
Common sense in not very common.

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