rectifier

Hi Guys, I need to pick the brains of anyone good with the start and end points of charging system on the XS. Mine is a 1981 400SE UK model. I’m very comfortable working with 12V DC Vehicle electrics so am rewiring this bike from scratch. I’m just previously used to four wheel charging systems...

Hello all, In my pursuit to figure out my charging issue I'm noticing I have four yellow wires coming from my stator, that hooks to a male connector with three yellow wires that continues into the loom. Everything I've read, I'm only seeing that there should be THREE yellow wires coming from the...

I own an SOHC XS400 as of today ! when wired to a new battery this thing runs beautifully but it wont charge the old battery. Thus I figured that I would try to replace the Regulator and Rectifier (which were cheap on ebay) and then replace the stator/alternator. However, this bike has a weird...

(The day it was dropped off at my shop) (Current state) Hello everyone, I’m new here so I will introduce myself and my 400 project. I inherited this project from a overwhelmed friend and decided to use it as a little learning project. I’ve owned a dozen or so vintage bikes and just always...

Hey guys & gals, I'm working on converting from the stock charging system to a PMA charging system on an XS400. The stock charging system was getting weak (although I didn't note it had failed) and the rubber seal where the wires pass thru the crank case cover were a leaking spot. I...

Ok guys, here we go again! I know this is another thread that has been posted probably about a MILLION TIMES. So I am just going to say that I did READ THE MANUAL, performed the tests as they say. I did search around on different threads for answers, but it seems that they always start off with...

I can fix engines, I can fab parts, I can build tools.......but electrical stuff is not my strong suit. Anything more than just basic wiring or similar is beyond my area of expertise so I'm hoping to enlist some help from the more experienced people on here. I'm working on building a Cafe...

Hi everyone. I'm starting a charging system thread, and a thousand apologies for that. My issue is, near as I can tell, a new one, and one that's virtually impossible to Google. My problem is that my new combined reg/rec seems to be outputting 12V flat to the battery. Just try searching for...

Hey guys... Really need some help trying to sort out my '79 XS400. I've had some major issues along the way since day one with this machine and I'm close to calling it quites. If I don't soon my wife is going to force it!!! Background: I bought a 1979 Yamaha XS400 with 18000 kms on it. Has...

Looking for some help. The saga starts two years ago: I was really happy scooting around on my 81 XS400 Special. I rode it for about 6 months... it idled pretty high, but for the most part, it ran just fine. It didn't have an electric starter button, but I rigged one up that worked great. On a...

So I was riding on my bike's longest ride to date and she died while on the highway. Thankfully I had a buddy of mine following because the reason she died is that my rectifier had flew off :yikes: (long story ), but he found it on the side of the road :D. When it did fly off it ripped the...

First, I will say that I am no electrical genius. The bike is a 77 xs400. It has given me no problems until recently the "signal" circuit fuse blew and the battery is no longer charging. This happened last year while I was living with the bike out of town with no tools so I brought it...

Hey everyone, I have a 1980 XS400. I did a barebones re-wire. Everything is complete besides the alternator system. I am super confused here, though. Does a 1980 have a combined regulator and rectifier? If so, how many wires should be coming out of it? Also, what is this guy...