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Referring to the manual for the vr test it says "start the engine and disconnect the wire running from battery positive terminal to the fuse box." Is this somehow not supposed to kill the bike? This is talking about the wire that connects directly to the battery, right? I don't understand this...

So heres the deal. I tested the wires coming out of the alternator casing as the manual says to, everything checked out. tested the rectifier, its good. just installed the r-292 regulator, and now still no charge. you can see it go up maybe .03 volts going from idle to 3k. battery is fully...

Alright. So last year I started this thread: http://www.xs400.com/forum/showthread.php?t=12997 and never got around to fixing it... Shame on me. But anyway, the rectifier shows no continuity (tested like in the manual) in the connector between any leads. Am I doing something wrong or am I...

I have read drewpy's write up and drewcifer's write up on this subject. They were both very helpful with understanding the whole charging system setup and troubleshooting. My question at this point (I have the r292 to put in my 77xs400) is why are there four wires on the new unit and three...

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...

I just changed my sprockets and chain, before i did it my clutched worked fine. after reassembling everything my clutch will not disengage. I adjusted it and you can feel the resistance on the lever as if it is working but with the lever in all the way the wheel won't roll. ...you can spin...

Bike runs great when the petcock is on reserve but in the "on" position it will idle rough and if you try to rev it or ride it anywhere, it'll make it a couple minutes barely running and die. (fuel level in the tank is nowhere near low) I'm wondering if the petcock is clogged in the "on"...