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Glad to be here and the XS that was meant to be...

Discussion in 'The Garage' started by AmbientMoto, Sep 18, 2020.

  1. AmbientMoto

    AmbientMoto XS400 Enthusiast

    Making more progress lately. Today we dove into the Right Hand Controls. The original was pretty mangled and missing the start button so we opted for all new switch-gear. Which means today I showed my 17-year-old how to solder. She did great; now we have a nice new harness and connectors, with an extra circuit to boot. Maybe we'll use it for an aux light, smoke screen activation or machine guns. We'll have to run a ground wire to the new switch as the old connected to ground through the bars, but that won't be too difficult:). New battery is ordered so hopefully by the time it arrives we'll have everything ready for a test start. IMG_2574.JPG
    You can see the start button and kill switch, which I much prefer to the original off/on/off rotary switch. There's also that aux switch, which will come in handy.
  2. Macabry

    Macabry XS400 Enthusiast

    Looking great ... like those bars :D
  3. AmbientMoto

    AmbientMoto XS400 Enthusiast

    Thanks; I've always liked that style bars on older bikes. Allows for a mostly upright position; I can't get into clip-ons.
  4. AmbientMoto

    AmbientMoto XS400 Enthusiast

    Had another wiring session today. We added a connector to the new left-hand controls and wired a few relays in preparation for the headlight circuit. Most old (and a lot of new) wiring schemes have headlights pulling power through other circuits, like tail lights and other things. I like to wire headlights direct to the battery with lower gauge wire as there's a noticeable improvement in brightness. We will be bypassing the old headlight relay completely. The headlight power will go through a relay, which will be triggered "on" by the old headlight wire (immediately after the headlight fuse). A second relay will temporarily disable the headlight and instrument lights when the starter button is engaged. At least in theory:) We also plan to add a yellow aux light (somewhat of a tradition on our bikes) and a "stealth" switch that kills the lights. Wiring is fun.
  5. AmbientMoto

    AmbientMoto XS400 Enthusiast

    As much as I enjoy wiring, I still have a lot to learn. Here's our plan for the new headlight circuit. If anyone sees a way to make it better... I'm all ears! Maybe @xschris can help.
  6. xschris

    xschris XS400 Guru Top Contributor

    The only wiring I do with these bikes is stock stuff. Plug and play is all I can deal with lol.
  7. CaptChrome

    CaptChrome XS400 Addict

    The idea I can suggest is to use the output of the existing headlight relay to "drive" the second relay that is really for the headlight. The advantage I see is that you can use alot of the wiring already in the harness and not have orphan stuff on the bike, the headlight off until the bike starts function is already figured out by Yamaha and is preserved, and you can still do what you only have to focus on one relay that will accomplish your goals of a dedicated power source for the headlight and the tie in to your "stealth" circuit.

    Also, this is easier to remove and put back to stock if you don't like it.
  8. AmbientMoto

    AmbientMoto XS400 Enthusiast

    @CaptChrome I considered that and we may still end up going that direction. My main motivation is this: all of the bikes I've owned (granted I've only owned a few) exhibit the following behavior: when the ignition is keyed on, the headlight and gauges light up. I like the immediate gratification of turning the key and seeing the lights. I *think* the XS headlight doesn't come on until the engine actually starts. The new scheme will change this.
  9. AmbientMoto

    AmbientMoto XS400 Enthusiast

    Today's session... not a lot of time but we worked on the left hand controls a bit more. We realized the connector we had started yesterday will not serve the purpose. SO... we started over.

    We decided to use the existing harness from the original controls. We cut it and dove in, adding I the appropriate bullet connectors.

    The new switchgear is wired for a positive horn. The original horn switch on the XS connects the horn to ground. We repurposed the black/ground wire from the original harness (the one that supplied ground to the self-cancelling unit through the signal switch) to supply ground to the horn. We taped off the now unused yellow/red wire; everything else in the original harness will function as intended.

    The left hand harness, modified for the new controls. The original connector is in good shape; it will connect to the main harness as it always has. You can see the now unemployed yellow/red wire, taped to avoid any mishaps.
    Berniesxs likes this.
  10. CaptChrome

    CaptChrome XS400 Addict

    Understood. Ultimately it is your bike, your time, your money and your decision. Make it like you want it to be.

    I like that you are documenting the circuits you are putting together and taking the necessary time to make proper terminations. I am always for good wiring, even if it is not stock, so good on ya!
  11. AmbientMoto

    AmbientMoto XS400 Enthusiast

    Today's task: start cleaning up and re-working the mess the PO made out of the fuses. He ditched the fusebox and attached in-line fuses to everything with cheap snap-on splices. So today we made sure we had continuity on all wires, cut them, and prepared them for a new fusebox. Here's the plan:

    The 12V from keyed ignition (brown wire) will feed a 4-way fuse box. Ignition and Signal wires will come from this box, on dedicated circuits. The original pre-fuse Ignition and Signal wires will become keyed power, to be used if needed.

    We plan to use one fuse for the headlight relay trigger (we are wiring the headlight direct to battery, via a relay) although we could use any keyed source (such as the original pre-fuse Signal, Ignition, or Headlight wires) for the trigger and have an unused circuit.

    The 4th circuit is reserved for an Aux circuit. USB charger and an aux light, although we may run the aux in a similar manner as the headlight (from the battery via a relay) as well.

    We'll keep the Main Fuse on it's own in-line fuse.

    Getting closer.

    Old meets new. We cut and crimped the existing wires, readying them for a new fusebox. You can see the brown wire with a circular connector, waiting for some heat shrink. This wire will feed the new fusebox, much like it fed the other circuits in the original wiring scheme.
    Macabry likes this.
  12. AmbientMoto

    AmbientMoto XS400 Enthusiast

    Catching up on this...
    We spent a few hours on Saturday, connecting all of the wires we had prepped. Started at the back with the switch 12v from the ignition, going into the new fusebox, then out of the fusebox into the new relays etc. I'll post photos when I can but for now, here's a short video.

    We tried to start it with no success; we had attached a short bit of fuel line and put a bit of fuel in the carbs. Then I realized "maybe it just doesn't have enough fuel. We then filled the fuel line with a bit more fuel...

    spectra likes this.
  13. Buddha

    Buddha XS400 Addict Top Contributor

    Her smile in the vid says it all.............
  14. CaptChrome

    CaptChrome XS400 Addict

    Very nice - congratulations! Bike sounds great.
  15. AmbientMoto

    AmbientMoto XS400 Enthusiast

    More random photos... progress:)

    Top view of the battery/electrics. The new fusebox lifts up to reveal a nice rats nest of wires and two new relays, the replacement Headlight relay and another that is specifically for powering the main headlight direct from battery. The Blue and Black wires connected to the battery are Pin 30 and 85 on the direct relay.

    The brown wire powering the fusebox is the OEM wire coming from the keyed ignition. Blue wire coming from the fusebox goes to the replacement headlight relay, and now powers the gauges. Brown and Red/Whote wires are OEM: Signals and Ignition.

    Bike runs great, at least at an idle:)

    Now we'll move forward. To be installed: Footpegs, side covers, new petcock. We need to clean up the headlight area and re-connect the clutch cable but we're getting closer to a test run.

  16. AmbientMoto

    AmbientMoto XS400 Enthusiast

    The good news:

    Easy kick-starts.
  17. AmbientMoto

    AmbientMoto XS400 Enthusiast

    The bad news: my daughter experienced that sinking feeling when you break a bolt:) But we've all done it... at least I have, and in worse places. She snapped the brass fuel fitting in the petcock. Easy enough to replace; it's an M8 size screw. We just rebuilt the petcock so it'll have to be opened up to remove any brass filings that might compromise the rubber bits inside.

    It gave over 40 years of good service... RIP the OEM fuel fitting.

    If anyone has a better solution than a generic M8 fitting... I'd love to hear it.
  18. spectra

    spectra XS400 Junkie Top Contributor

    Its like a sewing machine............ :D
  19. CaptChrome

    CaptChrome XS400 Addict

    Bummer, but a good lesson. It happens to everyone.

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