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    #1

    Tach response question

    Quickie question about Tach response
    I have nice throttle response, however it seems like there is a definite lag in tach catching up with real time RiPeMz, I can't imagine this is a normal. I know the gear @ valve cover is in fine condition (saw it when doing valves) I removed the end going into the tach itself and the cable was fairly square not perfect but by no means a circle, anyone have any pointers to determine the cause of the problem? I'm hoping its the $20 cable, but don't know how to tell!
    1983 GS650GL Not running when I bought it. runs great now
    Engine- Carb Cleaned, Valve Adj, Ignition Mod, balanced carbs, Polished/Painted engine, Exhaust wrapped
    Frame & Wheels painted, rebuild brakes/masters, Fixed Tach/Spedo, Sonic Springs in the Front, New handle bars w/bar end mirror/turn signals
    Still To-Do?
    Fuel sending unit, Fuel tank paint job?, LED headlight?, Seat falling apart, Solutions?, Changing look of the rear of bike, Seat, Brake/turn-signals
    Tags: tach, tach drive, tachometer
    #2
    Sluggish movement of the needles on speedo and tach are becoming more common.
    Not had it myself, so far, but others have had good results stripping the gauge head and carefully lubing a couple of points.
    Otoh, with regular use, the tacho might start getting more responsive.
    ---- Dave

    Only a dog knows why a motorcyclist sticks his head out of a car window

    Comment

      #3
      couple or three points
      ...if the cog is ON the valve cover, you want the right thickness in the valve cover gasket.
      ...you said the cable is a bit rounded. It need be the right cable and fit well. "rounding" does suggest a loose fit. Pack a toothpick in there, break it off and see if that helps.
      ...these devices use magnetism to work. They can lose it over time.
      ...since yours isn't making grinding noises and is still working somewhat, as to opening it up? well there's not a lot you can do unless it's full of insect droppings and whatall. ( I've had a tiny crab-spider living in one of mine-no idea how it got in) Tiny drops of oil (use a pin to apply a drop at the bearings) are unlikely to change much but will make you feel better. Squirting witch-doctor fluids in randomly through the bulb holes or wherever is a bad idea.

      Comment

        #4
        An update on my gauge situation,
        I decided to take apart the gauge to see what I could see First I found one of the two studs on the gauge was broken from the inside of the gauge nothing a little JB weld didn't solve. Beyond that it was a bit of a pain to take apart seperating the ring that retains the bezel was a pain it's crimped so it took a bit but I worked a screw driver around to pull the lip up and was able to separate the bezel/retaining ring from the gauge. The inside was clean but when I manually moved the needle and let go it returned to zero very slow. I used a clock oil on a dropper bottle to apply oil to all running surface and worked them around a bit after working it a bit it started to free up and traveled smoothly threw the gauge back in to confirm the oiling did the trick, have a nice quick and crisp throttle response now. Should have taken some pictures but I wasn't going into it knowing this was going to work so well.
        1983 GS650GL Not running when I bought it. runs great now
        Engine- Carb Cleaned, Valve Adj, Ignition Mod, balanced carbs, Polished/Painted engine, Exhaust wrapped
        Frame & Wheels painted, rebuild brakes/masters, Fixed Tach/Spedo, Sonic Springs in the Front, New handle bars w/bar end mirror/turn signals
        Still To-Do?
        Fuel sending unit, Fuel tank paint job?, LED headlight?, Seat falling apart, Solutions?, Changing look of the rear of bike, Seat, Brake/turn-signals

        Comment

          #5
          Originally posted by DrDankNuggs View Post
          An update on my gauge situation....................
          Very cool. Thanks for the update.

          I've replaced the cables on mine so I guess cracking them open is the next step. The tach is slow to respond, but a knock on the gauge gets it working. If I'm riding over 50mph the speedo is useless. It just goes wild waving back and forth from 40 to 120.

          1983 Suzuki GS 850 crazy speedometer
          https://www.youtube.com/watch?v=Sy4x8a9Pu3Q
          My speedometer goes nuts after about 70 mph.
          Roger

          Us states ridden (2024_10_06 18_48_44 UTC).png​

          ​

          Comment

            #6
            Originally posted by Burque73 View Post
            Very cool. Thanks for the update.

            I've replaced the cables on mine so I guess cracking them open is the next step. The tach is slow to respond, but a knock on the gauge gets it working. If I'm riding over 50mph the speedo is useless. It just goes wild waving back and forth from 40 to 120.

            https://www.youtube.com/watch?v=Sy4x8a9Pu3Q
            I still need to Jb weld the stud back in gauge (I need to take the gauge apart again ) so this time I'll take some pictures of the process to help anyone who may have the same issue, it's the least I could do with how much this site has helped me!
            1983 GS650GL Not running when I bought it. runs great now
            Engine- Carb Cleaned, Valve Adj, Ignition Mod, balanced carbs, Polished/Painted engine, Exhaust wrapped
            Frame & Wheels painted, rebuild brakes/masters, Fixed Tach/Spedo, Sonic Springs in the Front, New handle bars w/bar end mirror/turn signals
            Still To-Do?
            Fuel sending unit, Fuel tank paint job?, LED headlight?, Seat falling apart, Solutions?, Changing look of the rear of bike, Seat, Brake/turn-signals

            Comment

              #7
              Originally posted by DrDankNuggs View Post
              ....I need to take the gauge apart again ) so this time I'll take some pictures of the process to help anyone who may have the same issue, it's the least I could do with how much this site has helped me!
              Yes! Please and thank you. I’ve been wanting to take my tach apart to clean the face and colored lenses. I’ve read instructions but a pictorial would really help me hopefully not botch the job. I’ve been botching a lot of jobs lately.
              Rich
              1982 GS 750TZ
              2015 Triumph Tiger 1200
              BikeCliff's / Charging System Sorted / Posting Pics
              Destroy-Rebuild 750T/ Destroy-Rebuild part deux

              Comment

                #8
                Finally got around to taking the tach apart again, took all the pictures I'm going to put it all together in a concise post hopefully get it up tomorrow.
                1983 GS650GL Not running when I bought it. runs great now
                Engine- Carb Cleaned, Valve Adj, Ignition Mod, balanced carbs, Polished/Painted engine, Exhaust wrapped
                Frame & Wheels painted, rebuild brakes/masters, Fixed Tach/Spedo, Sonic Springs in the Front, New handle bars w/bar end mirror/turn signals
                Still To-Do?
                Fuel sending unit, Fuel tank paint job?, LED headlight?, Seat falling apart, Solutions?, Changing look of the rear of bike, Seat, Brake/turn-signals

                Comment

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