Yamaha XS400 Wiring Diagrams

[jayel]

Never let an Amish electrician wire your bike up!

just use this Uni wiring scheme, no problems any bike

 

[16VGTIDave]

I had a car wired that way once!

It mysteriously caught on fire...

 

[jayel]

I had a car wired that way once!

It mysteriously caught on fire...

your holy water probably wasn't holy enough

 

[saltydog]

oh please let us in on the secret wiring thingy..mr 007 lol we are all waiting to disect it

 

[skervey35]

Thank you so much wallster! Grate job! This is what im going to go with when i rewire my bike this spring! But i will remove the stock controls to simplify the bars and the wiring!

 

[EJ8TrapKing]

What are all the bare minimum wiring needed for xs400sh? or components that its needs to run?

 

[Sprunghub]

mine? headlamp main and dip speedo light, rear/brake light, horn, starter, am ok with those all fitted wired and working from battery, alternator is also wired to rectifer and voltage control box wired to field coil, but not yet to rest of cicuit, all that needs to be done is recfifer earth to frame and feed (red) to battery. The thing that is puzzling me is on Haynes Manual diagrams with all rest of junked wiring the brown from/to? the VCB is shown conectted to live load circuits whereas on servey diagram shown here it goes direct to earth???

 

[EJ8TrapKing]

where can i buy the 26 color coded wires?

 

[EJ8TrapKing]

Question. Would an xs400H Special II harness work with my xs400sh? is it universal to all xs400s?

 

[ksqrly]

So I am doing the rewiring on my 1982, and I found this little gem and I was wondering if anyone knows if it will work on my 400. Mainly the question is are the hook ups on the ignition and reg/rec the same on the 650 and 400

 

[EJ8TrapKing]

does anyone know if you need the diode on the original wiring to an 81 xs400sh to work headlamp?

 

[drewpy]

A diode is like a one way valve for electricity.

it stops any feedback coming back through the headlamp relay set-up you guys have in the US.

so you don't need it for it to work, but there may be other repercussions too

 

[Sokrates]

Here's another mininium wiring diagram from Stone:

http://xs400.net/wb/pages/technik-f...minimal-schaltplan-fuer-die-xs-nach-stvzo.php

 

[FarmBoy72]

Anyone have a clearer diagram for the xs400d, the one posted is too unclear for me.

 

[laneknaack]

thank you guys for the help

 

[camalot400]

hi guys i remember seeing a colour diagram for the 79 2e does any one know where that one is ?

 

[Robsteeler66]

question for the wiring gurus...maybe I'm missing something. If I make a new harness and lay it out on a board like Drewpy did, how do I know how long to make the wires?

 

[drewpy]

question for the wiring gurus...maybe I'm missing something. If I make a new harness and lay it out on a board like Drewpy did, how do I know how long to make the wires?

just slightly over estimate. If you read the text I put stickers down and recorded the item it connects to and any extra length needed, so you don't need a massive board.

most connections happen to within 100mm of the frame barring the headlamp bucket

 

[Ratracker]

Here's how I wired my '77 XS400 Cafe Racer project (kick start only). I was able to use my stock handlebar controls and when the kill switch is in the off position it cuts the power to the coils, the lights, and the horn. The only drawback is the brake lights don't work unless the lights are switched on. It wasn't a concern for me since I only leave the lights off when I'm kick starting the bike so they're not drawing from the battery.

Wally

Hey Wally, I'm doing a tracker build (kick start only) with ep34 relay and LED signals. Did your harness work well for you and where would be a good place to plumb in the signals?

 

[Pork Chop]

Can anyone explain if there are any problems with connecting the rectifier before or after the main fuse.

Cheers.