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General Category => Yamaha FJ1100 / FJ1200 Running Problems => Topic started by: captaudi on July 31, 2025, 11:49:48 AM

Title: Freaking tach acting up again
Post by: captaudi on July 31, 2025, 11:49:48 AM
Gents,

My tach has been playing nice for a couple months now, then this morning I'm shifting at 12k again. Am I the only on that has had the tach read double? I checked everything I can think of, I am at the point it has to be the tach itself. I really don't fell like changing out the cluster for an intermittent problem that may not show itself again this season. We can all agree getting the cluster out is a PITA.

Anyone?

Daniel
Title: Re: Freaking tach acting up again
Post by: 86FJNJ on July 31, 2025, 11:57:15 AM
FJ newbie here but my RPM needle sometimes bounces a little...had a couple times when it just seemed wrong and my RPM's sounded higher then the gauge was showing me...don't know enough about it to be helpful but I've come to think I should only expect so close of a reading from such an old bike. I also suspect my MPH gauge gets less accurate and shows a higher MPH than I am actually going when I get above 45mph....sometimes it says I'm doing 65 or 75 but based on the surrounding traffic and roads I'm on I don't think that's the case. Anyone have a GPS speedo they use?
Title: Re: Freaking tach acting up again
Post by: Pat Conlon on July 31, 2025, 02:15:29 PM
This old post may help...

https://fjowners.com/index.php?topic=18083.0

Title: Re: Freaking tach acting up again
Post by: red on July 31, 2025, 11:15:35 PM
Daniel,

It's not a new bike.   :sorry:
Just as a test, I would run a dedicated new ground wire to all of the ground connections on the back of the instrument panel.  It is difficult to find a flakey ground connection by any other means.  HTH
Title: Re: Freaking tach acting up again
Post by: FJ1200W on August 04, 2025, 06:58:38 AM
Quote from: Pat Conlon on July 31, 2025, 02:15:29 PMThis old post may help...

https://fjowners.com/index.php?topic=18083.0



You are the man

Thank you