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TCI Replacement 2020

Discussion in 'The Garage' started by Team Junk, May 15, 2020.

  1. Team Junk

    Team Junk XS650 Junkie XS650.com Supporter Top Contributor

    As a leap of faith I'm wiring Old Brown to wire directly to the Gonzo Box. Have a rainy 4 days ahead so hope to have the wiring done soon. Hoping the starter is sound and more a problem with the 40 year old stuff attached to it.

    And why the hell is shrink tubing so expensive ?

    Any ETA for boxes arriving in the vicinity of a running TCI bike ?
     
    MaxPete likes this.
  2. Jim

    Jim Beyond the edge, is the unknown. Here be Dragons XS650.com Supporter Top Contributor

    Untitled.png
     
    MaxPete likes this.
  3. Paul Sutton

    Paul Sutton Buckhorns on XV1000SE Top Contributor

    Maybe it is just the result of Covid-19 causing supply problems. For example a 12 pack of generic Zantac cost £2.30. Now due to shortages and cancer scares the price is now approximately £5. We may see a lot of this happening as the year progresses i.e. inflation/profiteering.

    Keep up the good work Team Junk and Jim.
     
    Last edited: May 23, 2020 at 2:36 PM
    MaxPete, gggGary and Jim like this.
  4. gggGary

    gggGary Stop that! XS650.com Supporter Top Contributor

    Hardware and tool shelves at at Farm n Fleet are starting to look pretty bare too.
     
    MaxPete, Jim and Paul Sutton like this.
  5. Jim

    Jim Beyond the edge, is the unknown. Here be Dragons XS650.com Supporter Top Contributor

    Supply or transportation issues..... any guesses?
     
    MaxPete likes this.
  6. Rasputin

    Rasputin XS650 Addict

    Really, I believe the cooperation and collective knowledge in this group is amazing.
     
    nj1639, Team Junk, Skip and 3 others like this.
  7. Jim

    Jim Beyond the edge, is the unknown. Here be Dragons XS650.com Supporter Top Contributor

    So... 4 dollar triggers just showed up. For size.....

    IMG_20200523_143823.jpg


    Next to TCI trigger....


    IMG_20200523_143955.jpg


    .... and in the stator cavity.


    IMG_20200523_144050.jpg



    Looks easily doable. Only one problem though.... these sensors are magnetic, whereas the TCI sensor isn't.


    IMG_20200523_144959.jpg


    Jack, since you're the brains behind this.... and prolly have tons of bookmarks to sort through, can you do some more research on this trigger? It looks to me like it's a magnet waiting for an iron core sensor to run under it? Instead of the other way around like the TCI system?
    If that were the case, it'd be great. Replace 3 of the plain steel screws in the rotor with brass and leave the one steel in there. That would be the trigger. How cool would that be....
     
    Last edited: May 23, 2020 at 3:22 PM
    Paul Sutton, MaxPete, 2XSive and 2 others like this.
  8. Signal

    Signal XS650 Junkie Top Contributor

    Jim my thinking on it is that the signal is generated by a change in the magnetic flux lines cutting the conductor of the trigger coil. A passing magnet or piece of iron will change the flux lines of the trigger coil.
    A magnet may generate more signal than iron but I think it will work.
     
    MaxPete, Team Junk, gggGary and 2 others like this.
  9. Jim

    Jim Beyond the edge, is the unknown. Here be Dragons XS650.com Supporter Top Contributor

    I tend to agree... either would give us a signal, Signal (pun intended ;)), but it would be nice to know how Yamaha did it.
     
  10. YamadudeXS650C

    YamadudeXS650C Central New York XS650 XS650.com Supporter Top Contributor

    :popcorn: :popcorn:

    I'm getting that feeling I experience when I'm nearing the finale of 2001 A Space Odyssey

    upload_2020-5-23_17-50-35.jpeg
     
  11. Team Junk

    Team Junk XS650 Junkie XS650.com Supporter Top Contributor

    The pickup in the simulator is magnetic and works fine . Looks like some wiggle room there vs. the stock sensor.

    The gonzo does kinda looks like the monolith.
     
  12. Team Junk

    Team Junk XS650 Junkie XS650.com Supporter Top Contributor

    Pickup looks just like I thought it would sitting in the stator cover. Do the mounts look they will line up if bent horizontally. I think the pickup being magnetized will be fine with the magnet.. That one screw is pretty close to the magnet so I steel and 3 brass might work. Might require ditching the woodriff key and finding the fire position by hand.
     
    Jim and MaxPete like this.
  13. thuban

    thuban Horse Scratcher Top Contributor

    I think that magnetic pickup will be looking for a non-magnetic reluctor . ( I'm sorry, a reluctor that is not magnet) If so, it won't work. But I don't know.

    Then again, would be interesting to know if a magnet passed across the TCI pickup is generating a voltage as a signal to the TCI box? Would be a reason that a weakened magnet
    won't trigger anymore; not producing enough voltage for the TCI box? Again, I don't know. I did re-read this whole thread and I saw no mention of the above but I may have missed it. Don't even know if it applies. Only reason I might think that is as Jim showed, the copper around the magnet is acting as a Faraday cage to isolate the magnets field from the electrically induced field of the "hoochie"...technical term, so the pickup can see or receive the (induced voltage signal) from the magnet. Makes my brain hurt.
     
    Last edited: May 23, 2020 at 10:02 PM
    gggGary, Jim and MaxPete like this.
  14. Team Junk

    Team Junk XS650 Junkie XS650.com Supporter Top Contributor

    The test pickup in my simulator is almost the same as this pickup. It's magnetic and your right it is to pick the lump of steel on the outside of the flywheel. On the other hand it works just fine with a magnet. And the magnet Jim is using is a magnitude greater Gauss than the stock one so I don,t think the rotors field will affect it.
     
    gggGary and Jim like this.
  15. thuban

    thuban Horse Scratcher Top Contributor

    That's interesting! I'm cheering for you guys! Trying to keep my head around it!
     
    YamadudeXS650C, Jim and Team Junk like this.
  16. Jim

    Jim Beyond the edge, is the unknown. Here be Dragons XS650.com Supporter Top Contributor

    There's plenty of room to move the sensor around. Might just do another rotor for "plan B."
     
  17. Team Junk

    Team Junk XS650 Junkie XS650.com Supporter Top Contributor

    I think you will be able to position the pickup far enough away from the surface of the rotor to avoid picking up the screw heads because of the strength of the magnet. Could you compare the relative strength of the stock magnet vs. the neo. Perhaps different weight bolts that they will pick up. I really think the neo magnet is much more powerful so can be sensed at a higher flying height. How close is the stock pickup?
     
    Jim and gggGary like this.
  18. XsJosh

    XsJosh XS650 Enthusiast

    I was just wondering the same thing, what does the donor bikes stock set up look like? Is there a magnet on the rotor or just iron? What's the stock air gap? So may questions...
     
    Team Junk, Jim and gggGary like this.
  19. Team Junk

    Team Junk XS650 Junkie XS650.com Supporter Top Contributor

    I think the magnet is the safer bet here. Trying to snag a signal in the field of the rotor is tough. Think of the slap test.
    I suspect the magnet is placed so it is opposite the magnetic field of the rotor. I don't think the screws will be magnetized enough to interfere as long as the flying height of the pickup is high enough. Like I have said before, that little magnet is pretty powerful.
     
    Last edited: May 24, 2020 at 1:18 PM

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