Bouncing Speedometer

[balky1]

Interesting. I have similar prob on my '85. It doesn't bounce constantly, but if I ride it continuously for an hour-hour and a half then starts bouncing whenever I get over some bumps. So I figured out it has something to do with forks stretching and compressing as it straightens or bends the cable that way. I lubed the gear and cable with no change and just left it like that.

Balky, I think you'll find it's just the bumps, not the cable bending as the forks compress. If you hold a speedo in your hand and move it down and up quickly the needle will rise and fall. If it's lost some of its damping, it will jump over bumps.

Noel

Thx for input Noel. It doesn't worry me too much, I try not to watch it anyway. 

[FJools]

I found the cable was causing mine - but it only happened around the 110kmh mark and cleared up as you hit 130Kmh (allegedly officer)
New cable cured it but I don't think this sounds like your problem.........

[oldktmdude]

   GPS speedo from Speedhut fixed my bouncing needle. Not cheap but better than an expensive speeding fine.

[ribbert]

   GPS speedo from Speedhut fixed my bouncing needle. Not cheap but better than an expensive speeding fine.

For $100 I got a GPS/HUD speedo that projects my speed onto the inside of the shield, I love it.

Noel

[red]

GPS speedo from Speedhut fixed my bouncing needle. Not cheap but better than an expensive speeding fine.

For $100 I got a GPS/HUD speedo that projects my speed onto the inside of the shield, I love it.
Noel

Noel,
Hey, links, man, links!  Can't just hit-and-run like that!      

Okay, now this lil black box runs as HUD or read it straight, as you may wish, and costs a breath-taking US$38.  Rapid updating and Very accurate.  (Free shipping on Amazon orders over US$49.)

https://www.amazon.com/Kingneed-Vehicle-Head-Up-Speedometer-distance/dp/B0148JUT7W/ref=lp_3032928011_1_1?srs=3032928011&ie=UTF8&qid=1470838434&sr=8-1

Cheers,
Red

[FJmonkey]

Okay, now this lil black box runs as HUD or read it straight, as you may wish, and costs a breath-taking US$38.  Rapid updating and Very accurate.  (Free shipping on Amazon orders over US$49.)

https://www.amazon.com/Kingneed-Vehicle-Head-Up-Speedometer-distance/dp/B0148JUT7W/ref=lp_3032928011_1_1?srs=3032928011&ie=UTF8&qid=1470838434&sr=8-1

Cheers,
Red

I just ordered one, I will post up when I have it installed. Great find, thanks Red.

[barberman91]

I know that this is off topic, but do you guys know of any way to test the tachometer. mine doesn't work at all and all of my other gauges work just fine. I currently have the cluster off of the the bike.

[balky1]

I know that this is off topic, but do you guys know of any way to test the tachometer. mine doesn't work at all and all of my other gauges work just fine. I currently have the cluster off of the the bike.

Just to clarify, tachometer is the RPM part? I know it sounds silly, but in Europe tachograf is a paper that records your speed in larger trucks and, hence, many call the speedometer tachometer.

[barberman91]

Yep it's the rpm gauge

[red]

Just to clarify, tachometer is the RPM part? I know it sounds silly, but in Europe tachograf is a paper that records your speed in larger trucks and, hence, many call the speedometer tachometer.

Balky1,

In the USA, the Speedometer gives the vehicle speed along the road.
The tachometer gives the engine speed, as RPM.

Cheers,
Red

[ct7088]

I can only tell about the 84/85 model, orange wire is connected to the #1 and #4 coil trigger coming from the TCI, light brown is 12 volts and black is ground. All three wires go through the 9 pin connector first. The black wire detours to the headlamp socket then back to the 14 pin connector with the orange and light brown wire. The fuel gauge shares the same 12 volts and ground along with the fuel, oil, neutral and high beam annunciators. Check resistance between the orange wire at the coil connector and the orange wire at the orange tach wire. Resistance should be less than 1 ohm.
Chris