engine

  1. 1lowdiesel

    GSXR engine swap....

    So sitting here at work brainstorming about a motor swap and found a good deal on a GSXR 600 motor complete with wiring and all just needs a few small things to make it run. I have the mechanical capabilities to actually make it fit and work, but i'm more concerned about the handling of the...
  2. B

    replace head looking for advice tips and anything that will help me out

    so i picked up a 1980 xs400 for what i thought was a steal $550 and i rode it about 50 miles before it spit out the left bank spark plug the yamaha dealer in town said it was too big to fix so i got a new head to swap off a parts xs400 i have i pulled the motor out and cleaned it up with...
  3. chkm8

    Starter stopped working

    Switched handlebars a couple weeks ago. I always kickstart but thought since I had a fully charged new battery I would try the electric start. Hit the button, nothing. No click, no anything. Still kicks just fine. Any ideas?
  4. sly409

    pulled my spark plugs...looks like carbon build up?

    I just wanted to see if I'm reading this right. I'm thinking carbon build up = running too rich?
  5. AMR-XS400

    ID of carbs

    Hi guys, i have 6 sets of Carbs that came with my basket case xs400. a number of them have white on them saying XS400. I have noticed that they all look very similar bar slight differences :wtf:. The big difference is the air intake port. can anyone id these carbs?
  6. cookena69er2

    Bike will not stay running.

    I really hope you all can help me out here, this is my first motorcycle i have ever owned and i'm a newbie when comes to working on it. I have rebuilt cars from the frame up, so i'm handy with a wrench just inexprienced. I own a 1980 XS400G. It has 11,000 miles on it. No motor work done to it...
  7. D

    Rain induced backfire?? Possible?

    So my bike got frigen *soaked* at work today. Its been soaked a few times before, but this was the first time in 6 or 7 months. It started fine, I let it idle for a bit over a minute as I geared up, and took off. It was fine for about half a mile then suddenly BANG! Backfire. Loss of power...
  8. S

    New to the forum and I need help to find intake valves

    Hi Everyone, I have a 1982 XS400SJ Special Heritage. I have been restoring the bike and I was almost finished rebuilding the engine and then I got stuck. Yamaha no longer supplies the intake valves. I would really like to get brand new aftermarket valves but I do not know where to get...
  9. Orangetuesdays

    Mine...if I can get it to start!

    First off, hello! I'm from Bloomington, MN. This will be my first post on the forum but I've read through quite a few threads. Well, my girlfriend got a hold of a 79 XS 400 awhile back. Unfortunately she didn't do anything with it except let it sit in her garage. I don't know if it ran...
  10. A

    Shift Cam Re-Install

    okay, from previous post's, I did split the bottom end, with out touching the top end. When I put the Gears back into the machine, I wasnt getting any warm fuzzy that the gear changing is working, then when I got the whole engine together, the instructions said to test it while temporary...
  11. cabbott12321

    77 XS360 Bogging down and battery dying! Can't figure it out!

    IF YOU WANT TO SKIP THE LONG STORY PART I HAVE A SHORT SUMMARY OF THE PROBLEM BELOW! I have a 1977 xs360 and I've had a lot of on and off problems with it since I've had it. It has been good because I've been able to learn more about motorcycles and how to fix them through the process but...
  12. D

    Been working too much and my neck is messed up.. so I forgot what I ordered.

    It was like christmas!! Goodies: Disk brake pads, petcock(I don't mind spending the extra $$ to avoid an hour or so of headache rebuilding the old one. Also this is SHINY!), 17/35 sprocket setup, air filter(cheapie). Been too busy at work and my neck is killing with random headaches...
  13. S

    Oil Filter housing, why do you forsake me??? HELP!

    So, after a week of pain, I can't take it anymore. The bolt on my oil filter housing refuses to budge. I've taken PB BLASTER to it, an impact gun, JB Weld, called a machine shop, and went to a welder to have a wrench welded on, but it's too close to aluminum. I completely stripped the thing...
  14. T

    my bike is running terrible some times i have spark other times i dont

    I recently bought a bike that had sat for over 3 years ,its a 1977 xs 400 i worked thru most of the issues but there are still some problems i need help with. The bike picks and chooses when it will run on both cylinders some times it will only run on the left cylinder others only on the right...
  15. X

    new production pistons

    Saw this today. For $500 I think I would put a down payment on a new bike:laugh:http://www.ebay.com/itm/1980-YAMAHA-XS400-PISTONS-0-020-OVER-STOCK-/230784079392?pt=Motorcycles_Parts_Accessories&hash=item35bbcd9620&vxp=mtr#ht_500wt_1413
  16. A

    Right cyl does not run untill warmed up..

    Hi guys my son's bike, 79 xs400, Seems to start OK our temperatures have been close to freezing still most days here.. but left side runs right side is on and off unless you get the rpm's up to about 2500 then right side is fine.. once the bike has been warmed up a little right side works fine...
  17. Philodoxo

    What is my piston telling me ?

    Hi I'm just a simple lawyer with absolutely no knowledge (quite common among lawyers) - not even on the engines. I have a spare engine that I want to renovate - while I drive around on my XS400. That leaves me with 2 questions, that I hope you can tip me on: 1. Are the pistons so worn...
  18. dburrows6735

    Runnin' HOT BABY!

    I was in a local shop this week and was talking wrench. I'm still learning so cut me some slack please. We were talking about "bluing of pipes" and my new found friend said if you have blueing you are running to lean and need to rich it up. I have yet to find my richness adjustment but...
  19. karatekid1194

    MY XS400 video of exhaust sound Mac 2-2

    Her name is Ellie! enjoy. :) I would recommend this exhaust system to everyone and anyone bc it sounds great and takes no rejetting. For gators also make it look old school "euro" I'll have a pic or vid of my mirrors whenever they get here to.
  20. E

    Swapping 1981 motor with 1978... hmm

    Ok fellas, Hi, thanks for having me. I just joined and I'm asking questions and maybe not all the right ones... I sure could use some help here. I have a 1981 SOHC xs400 and I'd like to swap motors for a 1978 SOHC motor. Will these swap out, bolt in, and just rock out? Seems to me there may...
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