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  1. sleddog83

    Ignitor Failing?

    I managed to catch this fault on my bike before the chain cut through too much. It must have been an intermittent connection on your bike. I doubt if the tci would function at all if one of the pickup coil connection were severed. There is a misconception that one pickup is for advance and...
  2. sleddog83

    De-winterizarion?

    Yah I should do that while I wait for the battery to arrive.
  3. sleddog83

    De-winterizarion?

    I use my battery in a home made battery backup unit for my home router. Better to exercise the battery and keep a float on it during the winter months. But after 7 years it was getting a little tired. I thought I could squeeze one more season out of it when I put in back in the bike but I...
  4. sleddog83

    An Absence of Sparks

    If you are getting a spark when you switch off the key, that means that the tci is energizing the coil and as you switch off the key, the power to the coil collapses, thus a spark. I think the tci should de-energize the coil in the stopped condition, not energize it. It sounds like the tci...
  5. sleddog83

    TID12-01 TCI board schematic and extra info

    I have deleted my earlier schematic posting. I am posting this revised version. The previous one had many errors. Unfortunately reverse engineering these boards can be like trying to translate Klingon poetry by holding the book up to a mirror and reading it backwards. I was converting my...
  6. sleddog83

    Cb750k0 - any interest?

    No I didn't get thrown, but I could barely hang onto it. I had wound it up to over 145 km/h. As I throttled back and the bike was decelerating it started to wobble. Don't remember the speed, maybe around 110. If I accelerated the wobble disappeared. I was worried, because there was a...
  7. sleddog83

    Misfiring?

    If the bike is still original, that will be an early version TCI module. In theory it shouldn't make any difference which spark plug lead you use for the timing light. 15 degrees for idle is good. The real test is on the road. The TCI module advances the spark between 1900 and 3100 rpm at...
  8. sleddog83

    Cb750k0 - any interest?

    My second bike was 74 750-4, burnt orange color. Great engine. It could really cruise. Unfortunately I got into a high speed wobble on it. I survived, but lost my nerve to ride it. Sold it and gave up riding for a while. In hindsight, I think a bit of maintenance on the suspension would...
  9. sleddog83

    What have you done to your XS today?

    I installed a cheap Chinese digital voltmeter/tach that I bought off of Amazon. I wanted to have something that I could use to monitor the arduino TCI while running. The current version of arduino TCI outputs a 12 volt pulse that goes high when the first pickup pulse comes in and goes low when...
  10. sleddog83

    Aftermarket TCI Ignition Black Box

    I am not quite sure where this thread is going. Seems to be an argument about old versus new tech, which is in itself, quite an old argument. The components used in the old TCI boxes are not that special. The only component that was purpose-made for automotive use was the output transistor...
  11. sleddog83

    TID12-01 TCI board schematic and extra info

    10 uF... good. I guessed correctly. The abbreviations I used such as T1C, refers to connecting to the collector of transistor T1. Some of those signals go all over the place. It easier just to reference it one place, rather than draw schematic lines all over the place. On the oscilloscope...
  12. sleddog83

    TID12-01 TCI board schematic and extra info

    I have been collecting this information for a while. Finally getting around to posting it. I don't think this stuff is stored in the tech section. The picture of the bottom of the circuit board was done when I was reverse-engineering the board. I thought it might be useful for anyone who...
  13. sleddog83

    Arduino TCI

    thanks. I'll have a look. I started out using ucad{microcad). It was easy to use and learn but had limited features. Have been struggling with kicad.
  14. sleddog83

    Arduino TCI

    I am including some captures from my oscilloscope. Use the schematic from the previous post as a reference. I added a couple of refinements to the board to help me trouble shoot issues . The led lights up after the program has completed the setup phase. So if the the led it lit then: a)...
  15. sleddog83

    Arduino TCI

    I have been thinking of posting an update including schematics. Will get around to it later today or tomorrow. I will try to sum up what I have done. I was experiencing some reliability issues on the bike, mostly with starting it. Once it was started it seemed run okay. Also it ran...
  16. sleddog83

    idles fine but dying under power

    I had a career working on electronic systems. The key for troubleshooting for me, was to reexamine the work that was done on the system prior to it failing. What this meant back then was, which cabinet was the last tech rummaging around in during the last maintenance visit? Did he leave a...
  17. sleddog83

    wire loom connector identification xs1b

    Slow and steady wins the race. Raymond has some good advice there. There are some good references in the tech section. If you don't have a multimeter, you may want to consider getting one at some point. Doesn't have to be expensive or fancy. I would recommend getting one that has an...
  18. sleddog83

    wire loom connector identification xs1b

    Well I don't have an xs1 but I can try helping. First of all, do you have a wiring diagram. If not, print one out. Some of the nomenclature is: the connectors are the white plastic bits on the ends of the loom. The pins are within the connectors. The use of the terms male and female when...
  19. sleddog83

    What should I be doing?

    Ditto what every one else said. Some of those screw heads are too far gone to salvage. You will want to source some replacements somewhere. Like gggGary said, you should label those fuse holders. The manual diagram will explain the wire color coding. After 40 years of dirt, oil and heat...
  20. sleddog83

    What should I be doing?

    When you get a chance, could you send a few more pictures? I would like to see a better picture of the fuse box area, assuming there is still a fusebox. Also, pull off the cover where the points are located and send and send a picture of that area. Check the serial number of the engine. It...
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