ignition

Hi, I messure 11.4 volts at my coils with the ignition on, and motor off. Battery messures 12.7v Im having troubles with my right cylinder not firing up, and the spark seems very weak when I put the plug against the engine block. i tried cleaning the ignition switch, handlebar killswitch...

Hey All, I have a 1982 XS400SJ Heritage Special that is currently only firing on one cylinder. I had a shop take a look at it and they narrowed it down to a faulty coil that needed replacement. They told me that this specific year/model was Canada only and had some sort of unique coil that...

Hello everyone, haven't been here in a while because I haven't really putzed around with my XS400 for a few years. I've got a '78 XS400-2E that I had running exquisitely back in 2016 until I started having electrical issues - basically the original mechanical voltage regulator was fighting me...

Hey Guys, I have a 1976 XS360 with a backfire that has been plaguing me for a while now. It is only on the left cylinder, here is a list of things I have done so far to try and fix the issue. Adjusted points and timing (static and dynamic) Replaced points (only left, I got a set and the...

Hi guys, I'm a little lost on this problem and I'm hoping someone here can point me in the right direction. I've got a 1982 XS400 Seca that was running as of early August but now has no spark on either side after it was out in a good rainstorm. I have the service manual and I've been attempting...

Hey guys. So I just bought a XS 400 SECA from 1983. When I bought the bike it hesitated in the mid-range acceleration. I figured that it was just a carb adjustment. But no! After checking the spark plugs I found that the right sparkplug was very sooty (running rich) and the left was perfect...

I have a 1981 xs400 and had gotten it running after replacing the wiring harness. After riding for about 3 hours it decided to just up and die. Tried kick starting it but there is no spark, and the starter solenoid does not click when pushing the button. I tested the solenoid and it does work...

So I'm working on an old project bike my brother gave me. I put a brand new battery in and attached the starter motor directly to make sure it cranked, and it did, but then i hooked up the starter to the solenoid and hooked up the battery as usual. Now when I hit the start button on the...

As the title states, I'm desperately in need of a new TCI unit for my '83 XS400k. She's my only vehicle and I work 30 minutes away and the route takes me on a 70mph freeway for a large portion of the ride. I guess should tell you what symptoms I'm experiencing before I go off about how I've...

Hi Everyone, I'm new to this site (actually to the whole "forum" thing entirely!) but I've been having trouble with my bike and would gladly take all the help I can get! So a little history: In a previous buy I got two yamaha xs400's (1977 and 1978 I think). The 77 had a title so I used that...

(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...

Hello. This is my first post here. I reside in the small town of Athens, Ohio. I purchased my xs a few months ago from a friend in the military for a measly $150! It is a 1981 XS400 Special II, and has not been rode in 8-9 solid years. I just ordered a new cleaned up jug (seized pistons)...

I'm working on designing the rewire for my 1981 XS400SE (4G5). I plan to use an RR38 regulator/rectifier and a simplified design for the wiring. I'm hoping this will eventually be an easy to follow diagram for any of you contemplating carrying out a rewire Can anybody point out any places I'm...

I've picked up my new bike (1981 XS400SE) and I'm trying to plan for the re-wire. In the Haynes manual I'm looking at the wiring diagram for an XS400SE (4G5) and I can see condensers but I was under the impression that post 81' bikes had TCI units and not condensers? Did this model not get...

Hello guys, A few years ago when I switched my 78 from points to TCI I replaced all of the electrolytic capacitors in the ignition. These type of capacitors only have about a 10-15 year lifespan sometimes so its a good measure to replace them right at the start. After doing so the left...

I'm posting in here for my xs11 for this is where I've gotten the most help. Anyhow, I picked up a 79 xs11 a while back, it's missing the keys and I've been trying to Hotwire it (I have the ownership papers just haven't spent the money on a new key or ignition yet) , but I'm pretty dumb when it...

Hey there I'm currently making my own keyless ignition similar to motogadgets m-lock, a lot cheaper though. The problem is that is can only handle 3A, so i'm using an auto relay, i do however not know which relay to buy. I see the motogadget m-lock utilises a 40A auto relay, but isn't that a...

hey all! sorry for the long read, but i feel the info might help with my issue. July 3rd i roasted the circuit board on my stock ignition (non-points model, 81 xs400). 5:30 am, on the way to work, bike shut off, and stank of burning plastic. i still have it, and can post a pic of the specific...

So I am not really tearing into my bike too much until winter comes here in utah in around november, but Ive been messing around here and there while still keeping it my daily rider. I am looking into replacing all the aspects of the igniton system on my bike for reliability and modern...

Tore my carbs apart and cleaned them thoroughly with carb cleaner. Set the timing to be fairly accurate and point gap is perfect. Valve clearances all within spec on the tighter side (quite quiet now, might have read my old posts on the valve train noise, has all but gone away now with valves in...