Having trouble logging in? Try closing your browser and re-opening it. If that doesn't work, try a different browser or device. The site will be updated soon to resolve these browser issues.
Dismiss Notice
Enjoying XS400.com? Consider making a donation to help support the site.
Dismiss Notice
Want an XS400.com t-shirt? Go to the store to order. Limited sizes and quantities available.
Dismiss Notice

engine

Page 1 of 7

Thread
Xs400 engine job

Hi everyone! I've very recently bought an 83 XS400 Maxim, I did a compression test and have about 35 psi difference in between the two (sitting on...

Thread by: Btouchette94, Oct 2, 2022, 4 replies, in forum: The Garage
Thread
1978 xs400 motor issue

Hey, new to the xs world and new to the forum. I just picked a 1978 xs400. It's been sitting for a long time and the motor was locked up so I...

Thread by: Jared salsano, Jul 19, 2022, 7 replies, in forum: The Garage
Thread
Spark plug hole stripped/cylinder head removal

Bought my first xs400 yesterday for my gf to learn to ride on and have been trying to get it run and was taking the spark plugs out and who ever...

Thread by: Jonaven, Sep 25, 2021, 0 replies, in forum: The Garage
Thread
'81 Connecting rod big end bore diameter?

I'm fixing up an '81 engine and there is scoring on the big end of the connecting rod. Does anybody know/have a source for the big end bore...

Thread by: livinhard, Aug 23, 2021, 1 replies, in forum: The Garage
Thread
1978 Yamaha 400XS one cylinder won’t run!

Hi guys/gals. I have been using all the treads religiously and have found great help from everyone’s conversations but I’m defeated with my ‘78. I...

Thread by: RockyRo217, Jan 26, 2021, 14 replies, in forum: The Garage
Thread
Gooseneck Chopper

Gday peeps thought my current xs400 chop build might tickle some of your fancies its a 70s inspired gooseneck frame hardtailed one off just...

Thread by: thekinggrim, Dec 17, 2020, 27 replies, in forum: The Garage
Thread
Engine bolts broke

So my 78 xs400 has a seized engine so I went to pull off the cylinder head to manually rotate the pistons but before I could get the engine apart...

Thread by: Zachat03, Aug 26, 2020, 6 replies, in forum: The Garage
Thread
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...

Thread by: Bury Me In Smoke, Jul 13, 2020, 1 replies, in forum: Classifieds
Thread
'79 bouncing idle. I'VE TRIED EVERYTHING (kinda)

So this has been a year and a half worth of trying to figure out what is wrong with my bike. I bought this fully running about 3 years ago I...

Thread by: JessJGMiller, Mar 19, 2020, 29 replies, in forum: The Garage
Thread
Stainless steel bolts for the engine

Hi All, So I have stripped and cleaned my XS400 engine and am about to start the rebuild. I purchased a set of SS bolts for the engine off've...

Thread by: Bellerophon, Nov 7, 2019, 3 replies, in forum: The Garage
Thread
Make Offer - XS400 Engine and Carbs

I have an engine and carbs that I acquired long ago and would either like to sell the engine to someone who needs it, or buy a parts bike off...

Thread by: irishlord99, Nov 5, 2019, 1 replies, in forum: Classifieds
Thread
Crazy High RPM after revving the engine

So pretty much my bike is running fine until i rev the engine, after that the rpm's seem to go crazy high and wont go back down unless I am to...

Thread by: Ethan, Aug 2, 2019, 5 replies, in forum: The Garage
Thread
Unknown Problem?

Just got the bike a few weeks ago, was riding it yesterday and noticed as I coast to a stop the bike makes a high pitch noise. Any ideas? Thanks...

Thread by: WarrenG, Jun 10, 2017, 4 replies, in forum: The Garage
Thread
1981 XS400 Engine Build: A Story of Pictures, Videos, Beers & Tears

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....

Thread by: burr, May 18, 2017, 97 replies, in forum: The Garage
Thread
First time XS400 owner, first time replacing a camshaft. Anything I should know?

A friend gave me his old bike (78-79 SOHC) that had been sitting a while with a broken camshaft (timing chain came apart and crunched the socket)....

Thread by: MeltingDog, May 11, 2017, 2 replies, in forum: The Garage
Thread
Low speed, won't rev higher than 5k and won't do above 45

I have a problem that my bike doesn't want to go any faster than 45 maybe even 50. I have stock jets still and I'm not sure if that means much....

Thread by: Kosan181, Apr 27, 2017, 30 replies, in forum: The Garage
Thread
Engine will NOT mount

So, I picked up an '82 XS400RJ w/ DOHC, and as part of my tune up procedure checked the valve gap... Now I can't get the engine to mount to the...

Thread by: DOHCoddity, Apr 5, 2017, 3 replies, in forum: The Garage
Thread
DOHC Seca/Maxim Engine Differences

Hey all! I've recently started an engine rebuild here and I have a Seca engine as well as a Maxim engine. My plan is to use the best bits out of...

Thread by: OopsAboutThat, Jan 3, 2017, 6 replies, in forum: The Garage
Thread
Engine Heating and smoke coming from the exhaust

Hi, I have recently bought a Yamaha XS400 1982, It's my first bike ever and I just have a very little knowledge of mechanical work. My bike heats...

Thread by: djudge, Jul 5, 2016, 1 replies, in forum: The Garage
Thread
Whatever can go wrong, does.

So long list of problems to take care of right now. Piston Rings Left Cylinder burning oil like a siv, this is new. Gonna re-fit both. -(Just a...

Thread by: Monowakari, Jun 22, 2016, 7 replies, in forum: The Garage

Showing results 1 to 20 of 124

Page 1 of 7

engine

Useful Searches