xs400

so I know this isn't xs11.com but I've had a lot better input on here so I'm hoping for some luck. I bought this bike (79' xs1100 standard) and the guy I got it off really was doing some weird stuff with the wiring , I know it turns over and runs just fine by jumping it from the solenoid. I...

Hello all! Very new to the forums here but I am some need of some desperate help with the final touches on my cafe racer build. I'm running into 2 problems right now. My electric start currently is working, from reading other posts this is what I've learned and done. I took the ground from the...

Symptoms: bike stalls at low speeds takes forever to start after stalling once accelerating, bike thrashes wildly, jumping between 0-6000 rpms, jerking like crazy (scary) even at steady throttle, bike will start thrashing Background: This is a 1977 XS400 with about 12,000 miles on it. I've...

Hey Everyone! After hijacking a few threads, I figured I'd start my own. I'm rebuilding my 1981 Yamaha XS400H (4R5 engine). It's my first bike. I'm pretty mechanically inclined but I've never worked on anything like this before. Here goes nothing… A Little Intro: Bought this guy for $600 CAD...

Hello! I am new here to this forum, so please be patient if this is answered elsewhere. I am currently rebuilding a xs400 from the frame and engine up (I have a goal date of May 15th), for my fiance who is 5 foot 3. We have looked at the option of lowering her bike on the fork side and want to...

Greetings all! I finally finished my xs360 build, shes up and running and registered and on the road.....I was nearly over it at the end stages with all the fiddly crap (especially carbs) but got there in the end. This took a long time but I was in no hurry and I got most things the way I wanted...

Had this up on craigslist for a while but didn't like the idea of it going to someone who doesn't love/have a passion for the XS. Has mac 2-2 exhaust and sounds great. Couple small issues: small dent in tank from previous owner dropping it in the garage, speedo light is out, and a small tear in...

Hello fellow XS riders, Have any of you upgraded front brakes on your XS400? If so, what did you use/do? I could just replace the pads but I'm looking to get a little more stopping power and if anyone has any tips or suggestions, let me know! Thanks! Brian 1982 XS400

So I just pulled the top end on my 1980 xs400 and replaced a gasket that was leaking about half way down. I reassembled everything and with the top cover back on I put a 17mm on the flywheel and turned it to make sure it all went well.. it didn't. I'm hitting SOMETHING inside and its causing the...

HI im new to this forum and i would like to restore i bike ive seen on craigslist. Im going to look at it this week end but apparently it has low compression on one cylinder and a digital gauge cluster. the seller is asking for 1000 obo. what do you guys think? do i need a stock gauge cluster to...

Hi, I just bought a 81 xs400. The previous owner said that it had sat for awhile and only needed a new battery and the carb needed cleaned out. I have replaced the battery, cleaned out the carb, sprayed starter fluid in the intake, and replaced the spark plugs. Now it will turn and make a small...

Hi guys, Long time no post. I'm rebuilding my petcock with this kit https://www.amazon.com/gp/product/B007GR9SA8/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1 The kit has everything you'd want except for the in-tank fuel filter. Does anyone know a source for that item for this machine? Cheers...

New to the forum. Looking for a '77 or '78 xs360 or 400 (squarish) tank in decent condition for a decent price (no major dents). Let me know what's out there.

1980 Yamaha XS 400 Older style tank Runs Lots of newer parts (brakes, lithium battery with tender, cables, carb internals, etc.) Also new (not installed yet) mufflers, speedo, and tach Clean title (registration is lapsed) Bike is from the west coast and has little rust Would make a great cafe...

Back end is chopped and ready for some winter work. Any helpful tips on seat mounting? And any tips on minimizing electronics?

So I have just started cutting into the frame to add a loop to try to make a sweet brat seat. I am wondering if anyone has some good tips/ideas about mounting a seat as well as ideas to try to minimize The wires and electronics that I need. The box for my battery that I have that I will weld on...

Hi, I am new here, from guatemala, I recently bought a 1979 xs400 2f and I´m working on it, changed some motor parts and the engine runs well, i´ve found out that my alternator no longer works and I want to upgrade to a PMA system, I´ve done some reading mostly on this forum and found some...

Hey guys, I'm looking for a stator for a 1979 XS400. Maybe you have one on an old parts bike. These things rarely fail, but mine apparently has. Tired of waiting for one to pop up on Ebay! It should have 3 white wires and 1 yellow wire coming off of it. The early 80's XS400 had only 3 wires...

I need a petcock for my tank and was curious if one from a 1981 xj650 would work on my 1980 xs 400 tank.

Putting together an '81 XS400 barn find that was in a thousand pieces (most of all now in the right place), re-wired and ready to go, having an issue with starter, first thought was solenoid, so no have new one, still nothing thinking starter motor, all fine (hot wired to battery +/-, turned...