• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

Jumping Tach Needle

  • Thread starter Thread starter Curtie94
  • Start date Start date
C

Curtie94

Guest
I have a 1985 GS550es I have been working on lately.

I finally got to take it out for a small ride and I noticed the tach jumps around at higher rpm.

It does seem that it has a misfire at the same time the tach jumps around.

Where does the tach get it's signal from?

Would a coil that is in its way out cause the tach to jump.

Thanks,
 
My tach gets lazy sometimes. I just knock on the gauge and it wakes up, LOL. The speedo is real jumpy above 85 mph then settles after slowing down.

Check out the parts diagram. Hopefully this is what yours looks like. It was the most legible of the drawings. You can see number 14 is the drive gear that spins the cable so there's not an electric signal at all.

https://www.partsoutlaw.com/oemparts/a/suz/50d3f673f8700230d8b4c899/cylinder-head-cover

Not sure about your jumping gauge. Could be a worn cable or gear or if it's the engine speeding up, maybe an air leak somewhere?
 
Burque73 said:
My tach gets lazy sometimes. I just knock on the gauge and it wakes up, LOL. The speedo is real jumpy above 85 mph then settles after slowing down.

Check out the parts diagram. Hopefully this is what yours looks like. It was the most legible of the drawings. You can see number 14 is the drive gear that spins the cable so there's not an electric signal at all.

https://www.partsoutlaw.com/oemparts/a/suz/50d3f673f8700230d8b4c899/cylinder-head-cover

Not sure about your jumping gauge. Could be a worn cable or gear or if it's the engine speeding up, maybe an air leak somewhere?
Click to expand...

Take another look brother. The ES uses the plug (part #12) the E uses the sleeve and gear.
 
Curtie94 said:
I have a 1985 GS550es I have been working on lately.

I finally got to take it out for a small ride and I noticed the tach jumps around at higher rpm.

It does seem that it has a misfire at the same time the tach jumps around.

Where does the tach get it's signal from?

Would a coil that is in its way out cause the tach to jump.

Thanks,
Click to expand...


I have a similar problem with my 83 GS1100ES tach which is also electrical. It seemed to stabilize after I changed the ground to single point and replaced my stator and my R/R with a series type but it still buries the needle well past redline when it's not really turning that high. I just figured it's old and would need some type of electronic rebuild that I doubt I'll ever get to.
 
Yeah it's electronic. I also noticed the fuel guard jumps around as well. I'll check my grounds first.

Thanks.
 
You must log in or register to reply here.
Back
Top