1 Broke my speedo fixing my speedo. [Solved] Sat May 20, 2023 12:25 am
ark100
active member
SOLVE NOTE FOR OTHERS: For those with the same issue looking for a solution I'm popping it here for convenience. The issue quite literally was just poor contacts. I was on the fence about getting Deoxit as it was quite expensive and you need like a few drops of it but turns out can't beat the best and it fixed it almost immediately. Strong recommend you get the git with the bits because you're going into a few tiny crevices. This is what I bought from Jaycar.
Got an almost entirely original 1984 K100 with 80,000km. Speedo was a bit how you going and would usually not work until I knocked on the cluster then it worked for a while
I opened it, took it apart and sealed it again just to have a look (everything worked fine but issues still persisted).
Then I felt more confident and opened it a second time, just cleaned everything up, put it back together (still the same).
Then felt emboldened, decided i'd try to resolve the moisture issues and the speedo issues properly that these are so afflicted by.
1. I put some electric tape around the rim.
2. put a desiccant silica packet inside.
3. slightly torqued the 3 pins connecting the speedo cluster etc (the common fix to keep contact) and used some isopropyl and slightly buffed it for better contact using isopropyl.
4. did the same for the main plug interface (the two big wiring harness bits that plug from the bike into the back of the dash).
Now the speed won't show at all. Like at all, at all. Nada.
All other instrument parts seem to be working.
I don't know if I buggered something with the pins to the bike (i noticed that some are wobbly but I don't know if that's how they were before) and the 3 pin system seems perfectly fine so I have no clue.
Where do I begin troubleshooting this? What can I do to try make it work again that isn't the usual go-to which I've already done.
thank you
Does anyone have any inkling on what to do? I'm at a loss and all I can think to do is to just disassemble the entire thing and put it back together. I'm wondering if I just forgot to reattach a ground or something.
Also there was a single spare part which is wigging me out. It fell out, i have no idea from where but it looks like a tiny horseshoe. Can't attach photos but will do later.
Got an almost entirely original 1984 K100 with 80,000km. Speedo was a bit how you going and would usually not work until I knocked on the cluster then it worked for a while
I opened it, took it apart and sealed it again just to have a look (everything worked fine but issues still persisted).
Then I felt more confident and opened it a second time, just cleaned everything up, put it back together (still the same).
Then felt emboldened, decided i'd try to resolve the moisture issues and the speedo issues properly that these are so afflicted by.
1. I put some electric tape around the rim.
2. put a desiccant silica packet inside.
3. slightly torqued the 3 pins connecting the speedo cluster etc (the common fix to keep contact) and used some isopropyl and slightly buffed it for better contact using isopropyl.
4. did the same for the main plug interface (the two big wiring harness bits that plug from the bike into the back of the dash).
Now the speed won't show at all. Like at all, at all. Nada.
All other instrument parts seem to be working.
I don't know if I buggered something with the pins to the bike (i noticed that some are wobbly but I don't know if that's how they were before) and the 3 pin system seems perfectly fine so I have no clue.
Where do I begin troubleshooting this? What can I do to try make it work again that isn't the usual go-to which I've already done.
thank you
Does anyone have any inkling on what to do? I'm at a loss and all I can think to do is to just disassemble the entire thing and put it back together. I'm wondering if I just forgot to reattach a ground or something.
Also there was a single spare part which is wigging me out. It fell out, i have no idea from where but it looks like a tiny horseshoe. Can't attach photos but will do later.
Last edited by ark100 on Mon Jun 26, 2023 9:25 pm; edited 1 time in total