Adjusting Speedo to current mileage

I just bought a new original Yamaha speedometer on e-bay.

Question: Can the new unit be set to reflect the current mileage?

If so, how is it done without causing any damage?

Thanks!

 

i assume you mean INCREASE the mileage on the new odo vs ROLL BACK the mileage...

get a piece of speedo cable and chuck it into a hand drill, and then hook it to the speedo. run at a safe speed and just keep an eye on it...

 

I would stick a label on the speedo, somewhere out of view, giving the milage of the previous meter & don't tamper with the new one.

 

I would just put it in as is and call it good. Record your miles off the old one like Wizard said.

MN

 

The YAMAHA Speedo can be altered.

Between the Digit Drums is PLASTIC Lever-arm which holds the current display in place.
<> IT IS FRAGILE <>
It moves and captures the next cog as the Digit Drums rotate.

You have to:
Raise the Arm and Rotate the Digit Drum.
There isn't much room for ANY kind of Tool.
So, ...
Use the TIP of a long "Darning Needle" to --> "TOUCH" the surface of the ARM.
Using the POINT of the Needle to "ENGAGE" the Plactic ... Move the Plastic Arm UP ...
AS LITTLE AS IT NEEDS TO BECOME DISENGAGED FROM HOLDING THE DIGIT DRUM FROM ROTATING.
Move the Digit Drum it holds.

Did I mention that they are fragile?
Use your Bomb Squad touch.

 

Rick's right; you simply need to "disengage" the column you want to move just enough to move it. Hard to describe, very easy to do but THEY ARE FRAGILE.

Myself, I went with "record and add the mileage" rather than take the chance with a brand new NOS speedo.

I adjusted a used one to match on my other bike.

 

Thanks for all the advice!

:idea: Placing the unit on a piece of foam pad, I got to looking at the roller assembly and saw there was a "C" clip holding a white plastic cap(10K side), which I was able to remove and expose a spring and another "C" clip.

This second clip holds the assembly along the entire odometer shaft.

Once the second clip is removed the carriage of numbers can be moved to the right to disengage them from each other and I was able to rotate them to the desired sequence (33,700).

Then I just re-installed the two clips and it's done.

This job does require a jeweler’s needle-nose pliers and two jeweler’s screwdrivers and for some of us magnifying glasses. 8O

 

What an amazing site! I was just sitting here thinking about how to change the odometer reading on my new speedometer to match the old one I recently took out. I logged on and wouldn't you know there's a new thread about that exact subject.

Anyway, I read the replies but I'm still confused. What exactly do you do to change the odometer reading on a speedo like the one shown in the pic?

Thanks for the help.

 

gitbox:

The "C" clip is located on the right side of the "odometer shaft" shown in your picture (on outside of the white plastic cover) there is one BRASS "C" clip on the outside of the cap and one on the inside of the cap w/ a spring!

See my previous post!

-PGDBUD

 

How did you open the case?

 

Remove the speedometer cable and remove the two bolts holding the gage cluster.

Remove the four screws holding the chrome cover.

Remove the six screws holding the bezel from the gages.

Remove the speedometer and then unscrew the trip adjuster.

Remove the two larger Philips screws on either side of the speedometer connection.

Pull the speedometer from the case.

 

http://www.xjbikes.com/Forums/viewtopic/t=15303.html

Check this link within this forum for more information.

 

Thanks PGDBUD.

I see what I have to do now. I hope I can do this without buying even MORE tools.

BTW, there are some great pics in the post you mentioned.

 

Thanks. What you have probably run into is the fact that your bike has "canned" instruments that aren't as easily accessible as the bikes that have "clusters."

In that case, the instruments can be carefully sliced open with a hobbyists' razor saw, and then glued back together once you're done. Takes a little bit of precision surgery, but if you mark the case in 3 or 4 places and then line the marks back up it will come out fine.

 

Fantastic! Got it all set and thanks again.

It's a good thing I took photos of the speedos. My original had 24939 miles on it when I swapped it for the SECA speedo which had 9169 miles on it. The SECA speedo had 9986 when I pulled it so.... 9986 - 9169 = 817 and 24939 + 817 = 25756, presto!