xs400

  1. E

    Xs400 no spark

    Hey all, I’m new to the forum but was wondering if you could help. I picked up an 81 xs400h, special 2 for basically free, but it needs a lot of help. It’s been sitting outside forever. The motor turns over but I’m not getting spark. I’m using the kick starter because the electric start does not...
  2. A

    xs400SJ Unique Coils?

    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...
  3. I

    Right cylinder missfires

    Hello, In the last two short trips I've had a problem with missfire on my right cylinder. The bike starts but has problems for about 15 secs. I can't figure out is it better with full choke or half on hot weather. Anyways, i drive it in half choke for some time so it warms up nicely. After it is...
  4. D

    XS400 Bobber

    Hey Guys, Ive got a 1982 XS400 monoshock rear end which I am converting to a bobber, I'm struggling to find a fuel tank that fits the width of the frame. Ive tried 80's sportster tank which are 6cm across the bottom centre mount. The width of my frame is 8.5cm-9cm. Would love to know if anyone...
  5. I

    Switch regulator on my XS400 1980

    Hi there, I've already created an thread some time ago about my problem with the regulator and rectifier. An electrician checked them and turns out that the regulator (i guess that's what it is, the 3 pin one) is not working propertly. As I live in Macedonia, shipping costs for a new replacement...
  6. TheOfficialRJ

    Does this sound right to you?

    Hello everyone, I wanted to get your opinion on whether this bike is running on both cylinders or not. I've had a problem with this bike before where it was only firing on 1 cylinder. I know this because one side was blowing cold air out of the exhaust. The head was cold as well on that same...
  7. P

    Oil leaking from stator

    Hey guys and gals. I just purchased a 1977 Xs 400 and I'm finding out a couple different things about this bike piece by piece. Cleaned the carbs and adjusted. But my points are giving me problems and I will be replacing them and the condensers. Anyways when I opened up the stator cap oil leaked...
  8. V

    New bike - please help me plan!

    Hey guys, I’m a semi new rider who just bought a ‘79 xs400. I briefly rode about 5 years ago, and pumped to get back into it. I am going to modify most things on the bike. I’m looking for input from more experienced wrenchers on whether certain things should be done first, last, etc. Any input...
  9. The Mighty Don Allan

    circlips over snaprings? or...

    Heyo, Im in the middle of a teardown, is there a reason that we shouldnt use snaprings instead of circlips to secure the wrist pins when setting up the pistons? As pictured below.. Thanks in advance!
  10. The Mighty Don Allan

    xs400 basketcase first build

    Good day folks! I am very excited to have picked up an almost complete basketcase xs400.. 2 fames (1 with papers), tripple trees, forks, risers, bars, tank, wheels, sprocket, carbs, headers and the engine which needs a top end rebuild, right side piston is pock marked from a blown valve...
  11. J

    Wanted - Front Brake Components to fit '79 XS400

    Title says it all. Got a great deal on a running XS400, but certain parts had been stripped off it completely. Looking for literally all the components for front brakes. Live in NC, but happy to pay for shipping.
  12. I

    Regulator and Kickstart alternatives

    Hi, I have XS400 Special 1980. I bought a new battery and after 2-3 days of riding, battery dies, the starter doesn't have enough power to spin and after some time it completely stops. I think it is because of the regulator. It is the original one as far as i know. However, shipping from ebay to...
  13. W

    1977 Yamaha Xs400 Help

    Hi All, I am brand new to this site! Great to see how much info is on here and how helpful everyone is! I have a 1977 Yamaha xs 400 that was passed down to me and has been sitting in storage for about 15 years. The bike did not start when I first started working on it (about a month ago). This...
  14. A

    1982 Seca no spark after rainstorm

    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...
  15. O

    Wanted - XS 250 or XS400 Starter motor

    For SOHC 1980 model. To ship please, good working order.
  16. B

    Xs400 not regulating

    I know i've read threw most of the posts about this, but I just don't understand what is going on. Help me out? The skinny: From engine: Black - field coil ground? Green - field coil 3 whites- ac current I have the r292 VR, the magnet works when energized directly from battery, green receiving...
  17. J

    1982 Maxim XS400 blowing main fuse

    So i was riding about a month ago, going over a hill when my bike died out on me. Pull over, tear it apart, find the main fuse blown. Replace the fuse, blows instantly as soon as I turn the key. I then found a melted connector under the gas tank, so i walked the bike about a kilometer home and...
  18. M

    Oil leak from stator wire grommet!!

    Hey guys, So I’ve had this infamous oil leak from my grommet that passes the stator wires thru the left side engine cover in my 81 xs400. I’ve tried replacing that engine gasket AND resealing that grommet with black RTV MULTIPLE times and it STILL leaks. I literally have no other ideas. I...
  19. Bury Me In Smoke

    For Sale - Parting Out 1976 XS360 & XS 400 Engine

    Selling everything I'm not using for a build Side Covers - $40 each Rear Turn Signals - $30 each Both Front Turn Signals w/ Headlight Mount - $70 Chain Guard - $15 Tool Box (no tools) - $15 Front and Rear Fenders - $30 each Battery Box - $25 Rear Inner Fender - $25 Seat (no tears) & Seat Pan -...
  20. B

    XS400 Seats

    I'd like to use the "Saddlemen Eliminator" tail section and seat for my '81 build and was wondering if anyone has used this seat on theirs before. I need to figure out if the seat frame hoop I'm looking at will work. What size seat frame hoops are you all using for cafe/brat builds?
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