What causes a speedometer to do this on R1100S?

[johnson92@msn.com]

When I increase the throttle it zeros out the speedo, and when I let off the throttle it recovers.

 

[BC1100S]

Sorry, not "signing in" to view your video. Any way of making it easier to access?

 

[johnson92@me.com]

Sorry about that, I didn't realize that it wasn't public. It should be accessible now.

 

[69zeff65]

Tach needle doesn't move?

It looks like the tach needle isn't moving when you open and close the throttle to make the speedo do its dance. I would guess something is crossed up in your instrument cluster, any chance you had recent repairs or work done around it?

 

[johnson92@msn.com]

No recent repairs. Although the tac doesn't move a lot in the video, it seems to work fine. Especially in lower gears, it uses the full range of the gauge fluidly with out jumping or hesitating.

 

[BC1100S]

Your speedo looks like its acting as a vacuum gauge. I haven't the foggiest idea what the issue is but I'd dig in and make sure that all wiring is as it should be.

 

[cycleman2]

The speed sensor on the R1100s is on the rear drive housing, directly behind the brake caliper. If the bike has ABS there will be two sensors on the rear housing, you want to look at the rear most sensor, the front sensor is for the ABS.

If you had a recent rear wheel change a couple of things to check, make sure the steel spacer was put in between the wheel hub & rear drive housing. If this is removed and the bike has ABS you will likely have to adjust the ABS sensor spacing to the ABS ring, it doesn't seem to affect the speed sensor the same way but who knows. It is also possible that the speed sensor got bumped or has come loose. Have a look and see if everything looks OK. This is an electronic signal to the speedo.

 

[BC1100S]

The speed sensor on the R1100s is on the rear drive housing, directly behind the brake caliper. If the bike has ABS there will be two sensors on the rear housing, you want to look at the rear most sensor, the front sensor is for the ABS.

Depends on the year. My 1100S has one speed sensor on the rear hub and one on the front. It has the EVO ABS.

 

[surfdad1060]

My 2001 11S drives off the rear wheel, there is a ring in the final drive that has a gap that sends the signal. It can jump out of its groove. If your pinky is small enough you can push it back in. It will also cause your odometer to not work. It seemed like none of dealers knew what I was talking about. It seems like BMW has a different speedo set up for every year of the Oilheads.