My 79 xs400 build

[bennett834725]

got the xs400 licensed and title today, oneday closer to riding the fuck also got a caam for it

 

[xschris]

It's always nice to be legal

 

[Spad]

xs, Party Pooper!!!!!

 

[bennett834725]

xs, Party Pooper!!!!!

?????

 

[bennett834725]

well last night i spent most of the night making brackets for the battery box which the battery sits in nice and firmly, also got the license plate bracket mounted up

 

[Spad]

Bennett, Supposed to be joke you were going to ride legal....Play on words...

 

[bennett834725]

oh ok lol i gotcha lol, and where i live if you ride with out endorsment or registation on ou they impound the bike on the spot

 

[Spad]

Oh,oh, good to know, I live in the same state just down the road...Bill

 

[bennett834725]

thats for grant county washington though

 

[Spad]

I'm in Benton County..not gonna check...Bill

 

[bennett834725]

So I started wiring the bike today and decided to scrap the old harness and build my own from scratch so I got the regulator mounted and recifier mounted up and started running wires and a buddy of mine says I'm going to have to run a resistor between the battery and ground cause the original harness and wires and lights acted like a resistor, so any one have some insure on this

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[bcware]

The lights and harness do act as resistors, that is true. I do not believe any of that resistance is necessary for everything to work, however. It serves a purpose; wires add resistance, but you need them obviously. Lights add resistance but we use the light, etc.

Drewpy has a howto for making a custom harness from scratch. I don't think he threw in any extra resistors or anything.

http://www.xs400.com/forum/showthread.php?t=5934

 

[Spad]

This advice you might have heard before, but take a picture of the old wiring harness before you throw it away..Take some pics of when you are redoing it....Some random pics of the wiring...It helps...Bill

 

[willem]

or just don't throw it out until your replacement works perfectly

bike sounds awesome btw!

 

[bennett834725]

well the harness i had originally was hagered as fuck, po did his own custom shit in the harness .

so i found this harness diagram for the xs650 which uses the same reg and rec setup and same amount of wires coming out the stator, so i am wiring the engine up today and then im going to wire lights turn signals and such once iget the engine to run and charge at the same time

 

[16VGTIDave]

Where in the wiring was your friend suggesting this resistor be installed? On the ground from the battery negative to the frame/engine??? If so, I'd suggest he put his pipe away for a while...

While that wiring harness is for the XS650, it is basically correct for the XS400. Keep in mind that we have 2 ignition coils. The horn/accessory connection could also be used for turn signal, gauge, neutral and oil pressure lights

 

[bennett834725]

Where in the wiring was your friend suggesting this resistor be installed? On the ground from the battery negative to the frame/engine??? If so, I'd suggest he put his pipe away for a while...

While that wiring harness is for the XS650, it is basically correct for the XS400. Keep in mind that we have 2 ignition coils. The horn/accessory connection could also be used for turn signal, gauge, neutral and oil pressure lights

yea i already had the coils wired up to the point where i could connect them to a battery and fire it up, but i am mainly using the charging system part off that harness diagram

 

[bennett834725]

so today i found out why my system isnt charging, my rectifier was fried , so i looked around locally for one and couldnt find one at all so i made my own.

 

[bcware]

Yep. It's just a bunch of friggin' diodes. No reason to spend like $100 on a used one.

 

[bennett834725]

yea lol an only 2 parts inside it with 5 wires on it i used radio shack 276-1185, and wired them up like this was pretty easy and thanks to who ever made this diagram, i do not take credit for the pin out