2.5 mini speedometer install and mount help

[Jordan]

Hey. I have my 1977 GS750. It currently has a Cb 350 speedometer installed. I want to install the 2.5 mini from dime city cicles with indicator lights. I read and found a lot of helpful information here but need some more help with the mounting and the wiring. I found a diagram here in the forum and I also have the bike's wiring diagram.

What is a good mounting bracket to use with this mini speedo?
and, I cant find some of the cable colors from my GS750 diagram. That is the help I need with.

The pic below is of the cables in the bike, I will attach later the diagram I found, as I can only upload 1 image per post. The speedo I currently have installed does not not have a backlight, so I was going to connect it to the grey wire but couldn't find it :|

Thanks...

 

[Gorminrider]

oh gee. That's awful.



but should be a grey wire somewhere . I've several diagrams and they all agree on Grey ("Gr") for dial lights. You may have to look further back than the headlight bucket.
musing, but ...Are you sure you want a mini speedo? I found them to be awfully hard to see as to the function of indicating speed. Plus, the LEDS for turn and high beam were glaring bright....but mine was the cheapest ebay one.

 

[Jordan]

oh gee. That's awful.



but should be a grey wire somewhere . I've several diagrams and they all agree on Grey ("Gr") for dial lights. You may have to look further back than the headlight bucket.
musing, but ...Are you sure you want a mini speedo? I found them to be awfully hard to see as to the function of indicating speed. Plus, the LEDS for turn and high beam were glaring bright....but mine was the cheapest ebay one.
View attachment 52699

This is the pic I found here and it is also the one I bought. And I know. But better bright, than no light at all. It is readable, not too hard.

 

[Eule]

Looking at the "GS750 (8-valve) Service Manual" at BikeCliff's site (which probably is valid for at least a 1977 bike and possibly later), I agree that you should have a gray wire.

If that gray wire is just plain not there, you might be able to use the brown wire that was used for the front parking light on non-US bikes. That MIGHT be the one in your photo that comes out of the bundle as a brown wire, has a blue splice connector, a short piece of green wire, and some tape. On the other hand, that brown-splice-green-tape wire MIGHT be something else entirely.

If you had an unmolested wiring harness on the bike side, I agree with the hand-written hookup in your second photo, showing which Suzuki wires go to which mini-speedo wires.

The general condition of the bike wiring in your photo is doing me a concern. I would humbly suggest you at least improve that splice (?) near the top of the photo that involves an orange wire, a blue wire, two black wires, and a wad of electrical tape. There is a flying strand off of that blue wire that's ready to do something you don't want when you pack all of that back in the headlight bucket.

For what it's worth, the genesis of that gray wire is supposed to be:

Red wire from the battery to the ignition switch.
Ignition switch connects the red wire to an orange wire.
The orange wire goes to the light switch (and several other places, including the kill switch, the brake light switches, etc.)
Light switch connects the orange wire to a gray wire.
Gray wire goes to the general illumination lights in the instrument cluster.

(Gray wire also goes back to the ignition switch.
Ignition switch connects the gray wire to a brown wire.
Brown wire goes to the tail lamp - the dim filament of the tail/stop lamp.
Outside of the US, brown wire also goes to front parking lamp.)

I hope this helps!

Eule

 

[kochic]

I used the cheapest on ebay years ago on my savage bobber, still working with no problem.I had to put a relay for the neutral light, the polarity was not good.
Yours look to have 2 wires for each idiot light, probably easier to fit.The pic is not very good, probably the same speedometer as Gorminrider with the idiot light vertically.
Marc

 

[Jordan]

Thank you very much for all the info. I found all the cables and it works perfect. So if anyone has an untouched harness and wants to install this mini speedo refer to the pic I posted previously for the wiring. ( I found it here in the forum).

Will post a picture later. Just need the diodes
Also if anyone knows of a good bezel to put this mini speedo please let me know